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2a58249fb2940aba0083966a6d2e96dc9473be80
subsection
80
83
Morphism for corollas
As shown in , the subspace of \mathsf {PL} spanned by trees that are not corollas is a two-sided pre-Lie ideal.The quotient pre-Lie algebra is isomorphic to the following pre-Lie algebra. Let us identify the image of the corolla \mathtt {Crl}_{n+1} with n leaves to x^n for all n\ge 0. In particular, the tree \includegr...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 111, "openalex_id": "", "raw": "F. Chapoton. Rooted trees and an exponential-like series. arXiv.org:math/0209104, 2002.", "source_ref_id": "3b3b2ae3dcac41b1b3b6ce4f863c245e2e7f3fd1", "start": 0 }, { "arxi...
0807.1830
A rooted-trees q-series lifting a one-parameter family of Lie idempotents
[ "Frédéric Chapoton" ]
[ "math.QA" ]
2,008
en
Mathematics
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1ab84d682397449535c109ee23f2bfa48b361bf2
subsection
81
83
Morphism to a pre-Lie algebra of vector fields
There exists an interesting morphism from \mathsf {PL} to a pre-Lie algebra of vector fields. We describe it here only as a side remark, as the image of \Omega _q seems to have no special property.Consider the the vector space V=\mathbb {Q}[x]_+, endowed with the following pre-Lie product:(f \curvearrowleft g)=x f \, \...
{ "cite_spans": [] }
0807.1830
A rooted-trees q-series lifting a one-parameter family of Lie idempotents
[ "Frédéric Chapoton" ]
[ "math.QA" ]
2,008
en
Mathematics
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d542c9ef2c9828d54cb58e907846ac75a636281e
subsection
82
83
First terms of some expansions
\Omega =\includegraphics [height=5mm]{a0.eps}-\frac{1}{2}\includegraphics [height=5mm]{a10.eps}+\frac{1}{3} \includegraphics [height=5mm]{a110.eps}+\frac{1}{12}\includegraphics [height=5mm]{a200.eps} -\frac{1}{4} \includegraphics [height=5mm]{a1110.eps}-\frac{1}{12}\includegraphics [height=5mm]{a1200.eps}-\frac{1}{12}\...
{ "cite_spans": [] }
0807.1830
A rooted-trees q-series lifting a one-parameter family of Lie idempotents
[ "Frédéric Chapoton" ]
[ "math.QA" ]
2,008
en
Mathematics
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ce0717b60c78a06a55d75a2d5d6372c61d2207e5
abstract
0
7
Abstract
Chern-Simons modified gravity models in 4-dimensions are shown to be special cases of low energy effective string models to first order in the string constant.
{ "cite_spans": [] }
10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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179483c05684ee372b5179ac3a9d15c0310ff360
subsection
1
7
Introduction
A Chern-Simons modified gravity in D=4 dimensions proposed by Jackiw and Pi , has attracted a lot of attention recently . The Jackiw-Pi model is derived from an action that consists of the usual Einstein-Hilbert term plus a topological term with a cosmic scalar field \theta appearing as a Lagrange multiplier. It was sh...
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10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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15f7d2a7c305115a2d7ae3c4b9882faf706da82a
subsection
2
7
Effective String Theory Field Equations
We will start by examining the bosonic field equations arising from the action I = \int _M L where M is a 4-dimensional manifold and the 4-form L is given in terms of a dilaton 0-form \phi , and a 3-form field H. We take an actionL_0 = e^{-\phi } \left( R_{ab} \wedge *e^{ab} -\alpha d\phi \wedge *d\phi + \beta H \wedge...
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10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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fbb2a5a498d71fca7507e0623fd7fd05d3d2d491
subsection
3
7
Effective String Theory Field Equations
We keep it in the action but it doesn't give any contribution to the variational field equations.In order to derive the effective string theory field equations, the action I=\int _M (L_0 + L_1 + L_C) is going to be varied as a functional of the variables \lbrace e^a , \phi , H, \omega ^a{}_b \rbrace in a fixed local co...
{ "cite_spans": [] }
10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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a20d412c4676c40556b63eeb19dd1c4fb0807cc7
subsection
4
7
Effective String Theory Field Equations
Since d^2\mu =0, the H-field equation may be replaced by\beta d(e^{-\phi } *H) = 0 .We also vary the connection 1-forms \omega ^a{}_b as independent variables and obtain- e^{-\phi } d\phi \wedge *e_{ab} + 4\epsilon \beta e^{-\phi } R_{ab} \wedge *H = \frac{1}{2}(e_a \wedge \lambda _b - e_b \wedge \lambda _a).These are ...
{ "cite_spans": [] }
10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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9ec159c0a19e416902cc776205e6eb97ae46ef90
subsection
5
7
Effective String Theory Field Equations
The reduced field equations becomeG_a - \beta \tau _a[H] + \lambda *e_a + 8\epsilon \beta D(\imath ^b (R_{ba} \wedge *H)) & & \\ - 2\epsilon \beta e_a \wedge D( \imath ^b \imath ^c (R_{bc} \wedge *H)) &=& 0 , \\ 2 \beta H \wedge *H - \lambda *1 &=& 0 , \\ dH - \epsilon R_{ab} \wedge R^{ab} &=& 0 ,\\ \beta (d*H ) &=& 0 ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 878, "openalex_id": "", "raw": "T L Smith, A L Erickcek, R R Caldwell, M Kamionkowski, Phys. Rev. D 77 (2008) 024015", "source_ref_id": "abe66fbd12d4fdcb40639713752d2f1250a67858", "start": 786 }, { "arxiv...
10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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f2b126e44490045ef5c642aa3d398cc385e42797
subsection
6
7
Concluding Comments
We first comment on variational field equations with dynamical torsion. In this case, independent \omega ^a{}_b-variations of the action \int _M (L_0 + L_1) yield the field equationse^{-\phi } \left( T^a \wedge *e_{abc} - \frac{1}{2} d\phi \wedge e^a \wedge *e_{abc} + 4 \epsilon \beta R_{ab} \wedge *H \right) = 0 .Thes...
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10.1140/epjc/s10052-012-1979-0
0807.1832
String-Inspired Chern-Simons Modified Gravity In 4-Dimensions
[ "M. Adak", "T. Dereli" ]
[ "gr-qc" ]
2,008
en
Physics
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ccb9edaad5a9c3b15c32b1f630bce99012fbab87
abstract
0
19
Abstract
Micro-optomechanical systems are central to a number of recent proposals for realizing quantum mechanical effects in relatively massive systems. Here we focus on a particular class of experiments which aim to demonstrate massive quantum superpositions, although the obtained results should be generalizable to similar ex...
{ "cite_spans": [] }
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
en
Physics
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415fff16f9e620d679808c2b663231f73743a54e
subsection
1
19
Introduction
Micro-optomechanical systems have recently attracted significant interest as a potential architecture for observing quantum mechanical effects on scales many orders of magnitude more massive than previous experiments. Proposals include entangling states of mechanical resonators to each other , , or cavity fields , , th...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
en
Physics
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de46cdc7da09552dcc818806c92127ca53304644
subsection
2
19
Quantum Mechanical Description
A more detailed analysis of the system begins with the Hamiltonian, given by Law  :H = \hbar \omega _a \left[ {a^{\dagger }}a+ {b}^{\dagger }b\right] + \hbar \omega _c \left[{c}^{\dagger }c- \kappa {a^{\dagger }}a\left(c+ {c}^{\dagger }\right)\right],where \omega _a is the frequency of the optical field, {a^{\dagger }}...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
en
Physics
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40bfe484f890341830cef29e048f357a4ecc3d66
subsection
3
19
Coherent State
If we consider a cantilever initially in a coherent state with complex amplitude \beta , the total initial state is given by \vert \, \Psi (0)\rangle = \frac{1}{\sqrt{2}} \left( \vert \, 0,1\rangle _{n_a, n_b} + \vert \, 1,0\rangle _{n_a, n_b} \right) \otimes \vert \, \beta \rangle _c. Under the action of the unitary o...
{ "cite_spans": [] }
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
en
Physics
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3b137d76ac7df3344c1d327b4da7532d46a24333
subsection
4
19
Coherent State
This is equivalent to stipulating that a measurement of the cantilever state alone is sufficient to determine which path a photon took with a reasonable fidelity. As will be discussed in section-experiment, obtaining this large a value of \kappa poses the most significant barrier to experimental realization.In practice...
{ "cite_spans": [] }
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
en
Physics
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4bb856fff3e38246042a928ee406cc11394acfe8
subsection
5
19
The cantilever at finite temperatures
At finite temperatures the exact wavefunction of the cantilever is unknown, so the state is instead described by a density matrix:\rho _c(0) = \frac{\sum _n e^{-E_n/k_B T } \vert \, n\rangle \langle n \, | }{ \sum _n e^{-E_n/k_B T } } = \frac{1}{\pi \bar{n}} \int d^2\beta e^{-|\beta |^2 / \bar{n} } \vert \, \beta \rang...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
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Physics
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60e9ee70c552a8f18444cc18e5e43645ae1e6934
subsection
6
19
The cantilever at finite temperatures
Provided that the opto-mechanical coupling strength \kappa is relatively well known (e.g., by independently measuring m, \omega _c, L, etc.) and the instantaneous quantum state of the cantilever is regarded as some random coherent state (as should be the case for the weakly mechanically damped systems discussed here) i...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2194, "openalex_id": "", "raw": "M. A. Nielsen, I. L. Chuang, and D. F. V. James. Quantum Computation and Quantum Information. Physics Today, 54:60–62, November 2001.", "source_ref_id": "1490452bea3905cb8f6a2e7f6c6857ccd980a...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
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Physics
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e5198d27a5930ed2057e9778a76a278afebd99cc
subsection
7
19
The Wigner Function and the Classical Limit
To study transitions between the quantum and the classical regimes, it is often convenient to refer to quasi-probability distributions, with which quantum mechanics can be formulated in the common classical phase space. One such distribution was proposed in 1932 by Wigner and can be obtained from the density matrix \rh...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 445, "openalex_id": "", "raw": "E. Wigner. On the Quantum Correction For Thermodynamic Equilibrium. Physical Review, 40:749–759, June 1932.", "source_ref_id": "3cad6ff12c4b24db9d45aaac9b8b16f96f136320", "start": 220 ...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
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Physics
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c50cda3bb3bd014a1a4eecd7be0fa982c146a875
subsection
8
19
The Wigner Function and the Classical Limit
This projection is equivalent to detecting a single photon at one output of the interferometer, where the phase term in the projection accounts for path length differences in the arms. Generally speaking, varying \theta shifts the interference peaks but does not modify the Wigner function in a significant way; hereafte...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1356, "openalex_id": "", "raw": "M. Paternostro, D. Vitali, S. Gigan, M. S. Kim, C. Brukner, J. Eisert, and M. Aspelmeyer. Creating and Probing Multipartite Macroscopic Entanglement with Light. Physical Review Letters, 99(25):2504...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
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Physics
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cdf36fc581d779d5ba3aba9cab2397e94debcdcd
subsection
9
19
Decoherence
In addition to “classical” phase scrambling caused by the initial thermal motion of the cantilever as discussed above, there are other effects which cause “quantum” decoherence of the cantilever. The signature of this type of decoherence is a reduction of the visibility's revival peak – this is caused by information lo...
{ "cite_spans": [] }
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
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Physics
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42d9a4a8ea867031cf42e1ab63e972306eb0760e
subsection
10
19
Environmentally Induced Decoherence
Environmentally induced decoherence is due to the coupling of the system to a finite temperature bath, and results in a finite lifetime for the quantum superposition of the cantilever. Decoherence happens when the thermal bath measures the state of the cantilever while the photon is in the cavity, introducing a phase s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1449, "openalex_id": "", "raw": "R. P. Feynman and F. L. Vernon, Jr. The theory of a general quantum system interacting with a linear dissipative system. Annals of Physics, 24:118–173, October 1963.", "source_ref_id": "15140...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
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aa12f2649e505d025454251bbcb81818be4827f1
subsection
11
19
Environmentally Induced Decoherence
The equation is valid in the Markovian regime when memory effects in the bath can be neglected; this is satisfied when the coupling to the bath is weak (Q \gg 1) and the thermal energy is much higher than the phonon energy (k_B T_b \gg \hbar \omega _c). Both conditions are easily satisfied for realistic devices. [Figur...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 646, "openalex_id": "", "raw": "W. H. Zurek. Decoherence, einselection, and the quantum origins of the classical. Reviews of Modern Physics, 75:715–775, May 2003.", "source_ref_id": "5719721ba818b3da7a5447ae179b9f41ca824043"...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
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Physics
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80633a39df25bda8bf296a35df810cc74294e62c
subsection
12
19
Gravitationally Induced Quantum Collapse
To explain the apparent classicality of the macroscopic world, it has been suggested that there may be a quantum state collapse mechanism for large objects, possibly induced by mass. Several proposals have been made which lead to such a collapse, among them reformulations of quantum mechanics , and the use of the intri...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 396, "openalex_id": "", "raw": "G. C. Ghirardi, A. Rimini, and T. Weber. Unified dynamics for microscopic and macroscopic systems. Physical Review D, 34:470–491, July 1986.", "source_ref_id": "d20121ec41dec0c94ceeb5f4bccc0da...
10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
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7673fcebbebdf531a95168d46637254f4d64b6de
subsection
13
19
Gravitationally Induced Quantum Collapse
If the atomic spacing is much larger than the effective mass radius, the energy due to the interaction between different atomic sites is negligible and the gravitational self-energy is given by:\Delta E = 2 G m m_1 \left( \frac{6}{5 a} - \frac{1}{\Delta x} \right) \quad \textrm {(given: } \Delta x \ge 2 a \textrm {)}.I...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
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71fcebff39f26fc8189af05bbb7b6d8f1dc74fe6
subsection
14
19
Optomechanical Devices
In practice, the experimental realization of a macroscopic quantum superposition is severely technically demanding. Perhaps the most challenging aspect is achieving sufficient optical quality, which is required to put the cantilever into a distinguishable state via interaction with a single photon, i.e. \kappa \gtrsim ...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
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f96bf9d8b18defcbd5615d448849373ed07847b3
subsection
15
19
Optomechanical Devices
Although the magnitude of this effect should be smaller for high finesse optomechanical systems due to lower absorption and incident light levels, at temperatures of order 1 mK absorption of even single photons should produce non-negligible heating . [Figure: A comparison of opto-mechanical devices, showing the finesse...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
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9d817f8311c65688948fa09551c3bc6dd639d03e
subsection
16
19
Optical Cooling
As stated above, unambiguous observation of a macroscopic quantum superposition is possible only when the cantilever's fundamental mode is in a low phonon quantum number state. Given that this requires temperatures of less than 1 \mu K for kHz resonators, the only way to practically obtain this is optical feedback cool...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
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4a32fd16ece13740a2cf99acd2752fdc849794b1
subsection
17
19
Optical Cooling
In the limit of low pumping power and minimal cooling, this ratio remains constant, but begins to rapidly decrease when the ground state is approached. When the ratio is less than half the low power value, the mean phonon number, \bar{n}, is less than one, providing a clear indication of ground state cooling. Because t...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
[ "quant-ph" ]
2,008
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Physics
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02b6971f384b2082a2baa1ebe18ff65b23feee2a
subsection
18
19
Conclusion
A detailed analysis of the effects of finite temperature on the proposed massive superposition experiments show that a fully unambiguous demonstration requires low fundamental mode temperatures, \bar{n} \lesssim 1. Despite this, observation of a revival of the interference visibility can be used to strongly imply the e...
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10.1088/1367-2630/10/9/095020
0807.1834
Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
[ "D. Kleckner", "I. Pikovski", "E. Jeffrey", "L. Ament", "E. Eliel", "J. van den Brink", "D. Bouwmeester" ]
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en
Physics
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9cfaf6a67d64e47c0a032a33d36e0b5a32b8d9c1
abstract
0
18
Abstract
In this paper biharmonic maps between doubly warped product manifolds are studied. We show that the inclusion maps of Riemannian manifolds $B$ and $F$ into the doubly warped product $_{f}B\times_{b}F$ can not be proper biharmonic maps. Also we analyze the conditions for the biharmonicity of projections $_{f}B\times_{b}...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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c9226905085c573f31e1e22bfee853ee0ac60f71
subsection
1
18
Introduction
The study of biharmonic maps between Riemannian manifolds, as a generalization of harmonic maps, was suggested by J. Eells and J. H. Sampson in . The energy of a smooth map \varphi :(B,g_{B})\rightarrow (F,g_{F}) between two Riemannian manifolds is defined by E(\varphi )=\frac{1}{2}\int _{D}|d\varphi |^{2}v_{g_{B}} and...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 145, "openalex_id": "", "raw": "J. Eells, J.H. Sampson, Harmonic mappings of Riemannian manifolds, Amer. J. Math. 86 (1964) 109-160.", "source_ref_id": "6c10598c378ff715736fb543f89ac3604b0b55ac", "start": 0 }, ...
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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2aac1603828d1184a072a7a0b040a85a676c01d4
subsection
2
18
Introduction
A doubly warped product manifold is a product manifold B\times F of two Riemannian manifolds (B,g_{B})\ and (F,g_{F}) endowed with the metric g=f^{2}g_{B}\oplus b^{2}g_{F} where b:B\rightarrow (0,\infty ) and f:F\rightarrow (0,\infty ) are smooth functions. The canonical leaves \lbrace x_{0}\rbrace \times F and B\times...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 494, "openalex_id": "", "raw": "R. Ponge, H. Reckziegel, Twisted Products in Pseudo-Riemannian Geometry, Geom. Dedicata 48 (1993) 15-25.", "source_ref_id": "36876886dc8b9d8d615701d421afbd64c8152734", "start": 260 }...
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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1c4256e816a21a93aa05b9c12ed1a2195bed4296
subsection
3
18
Biharmonic maps between Riemannian manifolds
Let (B,g_{B}) and (F,g_{F}) be Riemann manifolds and \varphi :(B,g_{B})\rightarrow (F,g_{F}) be a smooth map. The tension field of \varphi is given by\tau (\varphi )=trace\nabla d\varphi ,where \nabla d\varphi is the second fundamental form of \varphi .Biharmonic maps \varphi :(B,g_{B})\rightarrow (F,g_{F}) between Rie...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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5f463a489389d9d7520f9307d86423f30f480870
subsection
4
18
Biharmonic maps between Riemannian manifolds
Here \Delta is the rough Laplacian on sections of the pull-back bundle \varphi ^{-1}(TF) defined by, for an orthonormal frame field \lbrace B_{j}\rbrace _{j=1}^{m} on B,\Delta v &=&-trace_{g_{b}}(\nabla ^{\varphi })^{2}v \\ &=&-\sum _{j=1}^{m}\lbrace \nabla _{B_{j}}^{\varphi }\nabla _{B_{j}}^{\varphi }v-\nabla _{\nabla...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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c501eb00d938398f052cbad434b75e43f3f6a1a7
subsection
5
18
Doubly warped product manifolds
Let (B,g_{B}) and (F,g_{F}) be Riemannian manifolds of dimensions m and n, respectively and let b:B\rightarrow (0,\infty ) and f:F\rightarrow (0,\infty ) be smooth functions. As a generalization of the warped product of two Riemannian manifolds, a doubly warped product of Riemannian manifolds (B,g_{B}) and (F,g_{F}) wi...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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f2234e4eda0771a75c66aedbcdcc74499ed86d0e
subsection
6
18
Doubly warped product manifolds
The Levi-Civita connection of doubly warped product manifold _{f}B\times _{b}F is defined by\overline{\nabla }_{X}Y &=&\nabla _{X}Y+\frac{1}{2b^{2}}X_{1}(b^{2})(0,Y_{2})+\frac{1}{2b^{2}}Y_{1}(b^{2})(0,X_{2}) \\ &&+\frac{1}{2f^{2}}X_{2}(f^{2})(Y_{1},0)+\frac{1}{2f^{2}}Y_{2}(f^{2})(X_{1},0) \\ &&-\frac{1}{2}g_{B}(X_{1},Y...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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465443f09e577bd4e4ccfc960a01aa72e176198d
subsection
7
18
Biharmonicity of the inclusion maps
Let (_{f}B\times _{b}F,g) be a doubly warped product manifold. For y_{0}\in F, let us consider the inclusion map of Bi_{y_{0}}:(B,g_{B}) &\rightarrow &(_{f}B\times _{b}F,g) \\ x &\rightarrow &(x,y_{0})at the point y_{0} level in _{f}B\times _{b}F and for x_{0}\in B leti_{x_{0}} :(F,g_{F})&\rightarrow & (_{f}B\times _{b...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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ae2f83c41921dc89787e14dc10b5fbc789453f5f
subsection
8
18
Biharmonicity of the inclusion maps
We have\nabla _{B_{j}}\tau (i_{y_{0}}) &=&-\frac{m}{2}\nabla _{B_{j}}(0,{grad}\ f^{2})|_{i_{y_{0}}} \\ &=&-\frac{m}{2}(\overline{\nabla }_{(B_{j},0)}(0,{grad}\ f^{2}))|_{i_{y_{0}}} \\ &=&-m(\frac{1}{4f^{2}}|{grad}\ f^{2}|^{2}(B_{j},0)+\frac{1}{4b^{2}}(B_{j},0)(b^{2})(0,{grad}\ f^{2}))|_{i_{y_{0}}}.Then\nabla _{B_{j}}\n...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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a9f0faf92603df778ae6aea7c14812758a2c742b
subsection
9
18
Biharmonicity of the inclusion maps
Therefore the equation (REF ) has the form\tau _{2}(i_{y_{0}}) &=&\lbrace -\frac{m^{2}}{8b^{2}}|{grad}\ f^{2}|^{2}({grad}\ b^{2},0) \\ &&+\frac{m}{2}\Delta (\ln b)(0,{grad}\ f^{2})+\frac{m^{2}}{8}(0,{grad}(|{grad}\ f^{2}|^{2})\rbrace |_{i_{y_{0}}}.This completes the proof.Corollary 4.1 The inclusion map i_{y_{0}}:(B,g_...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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47a0e25d73fe862174759da4f0bca16c2b501be8
subsection
10
18
Biharmonicity of the inclusion maps
We have,Theorem 4.2 The bitension field of the inclusion map i_{x_{0}}:(F,g_{F})\rightarrow (_{f}B\times _{b}F,g) is given by\tau _{2}(i_{x_{0}}) &=&\lbrace \frac{n^{2}}{8}({grad}(|{grad}\ b^{2}|^{2}),0)+\frac{n}{2}\Delta (\ln b)({grad}\ b^{2},0) \\ &&-\frac{n^{2}}{8f^{2}}|{grad}b^{2}|^{2}(0,{grad}f^{2})\rbrace |_{i_{x...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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c0a3ebf4610569084fd2a89efbaacbe7d4dc7b1d
subsection
11
18
Biharmonicity of the inclusion maps
Since\nabla _{F_{r}}\tau (i_{x_{0}}) &=&-\frac{n}{2}\nabla _{F_{r}}({grad}\ b^{2},0)|_{i_{x_{0}}} \\ &=&-\frac{n}{2}(\overline{\nabla }_{(0,F_{r})}({grad}\ b^{2},0))|_{i_{x_{0}}} \\ &=&-\frac{n}{4}\lbrace \frac{1}{f^{2}}(0,F_{r})(f^{2})({grad}\ b^{2},0)+\frac{1}{b^{2}}|{grad}\ b^{2}|^{2}(0,F_{r})\rbrace |_{i_{x_{0}}}th...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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884537c7e728ef91206c32028af18481ce86578c
subsection
12
18
Biharmonicity of the inclusion maps
So we haveCorollary 4.6 Let (_{f}B\times _{b}F,g) be a doubly warped product manifold with non-constant warping functions b and f. Then the inclusion map of the manifold (F,g_{F}) into the doubly warped product manifold (_{f}B\times _{b}F,g) is never a proper biharmonic map.Remark 4.2 If f=1, _{f}B\times _{b}F becomes ...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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5e636a1445efcc14e083a15853dd0e3f315221bb
subsection
13
18
Product maps
Let I_{B}:B\rightarrow B be the identity map on B and \varphi :F\rightarrow F be a harmonic map. Obviuosly \Psi =I_{B}\times \varphi :B\times F\rightarrow B\times F is a harmonic map. Now suppose the product manifold B\times F (either as domain or codomain) with the doubly warped product metric tensor g=f^{2}g_{B}\oplu...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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fe10f103ae1cbb838030e9291bfceef643de701e
subsection
14
18
Product maps
Since \varphi is harmonic,\tau (\overline{\Psi }) &=&trace_{g}\nabla d\overline{\Psi } \\ &=&\frac{1}{f^{2}}\sum _{j=1}^{m}\nabla d\overline{\Psi }((B_{j},0),(B_{j},0))+\frac{1}{b^{2}}\sum _{r=1}^{n}\nabla d\overline{\Psi }((0,F_{r}),(0,F_{r})) \\ &=&\frac{1}{f^{2}}\sum _{j=1}^{m}\lbrace \nabla _{(B_{j},0)}^{\overline{...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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e07f4f7fa01d0a0dddd4f5637ecf4278d16a62a3
subsection
15
18
Product maps
By a straightforward calculation, we get \tau (\bar{\pi })=n({grad}\ln b)\circ \bar{\pi }, and the bitension field of \bar{\pi } is\tau _{2}(\bar{\pi }) &=&\frac{n}{f^{2}}trace_{g_{b}}\nabla ^{2}{grad}\ln b \\ &&+\frac{n}{f^{2}}Ricc^{B}({grad}\ln b)+\frac{n^{2}}{2}{grad}(|{grad}\ln b|^{2}).By using the bitension field ...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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9b2d0c0708d3d39fd9eb11021deaf31aa994de20
subsection
16
18
Product maps
Then \widetilde{\Psi }=\widetilde{\varphi \times I_{F}}:\,_{f}B\times _{b}F\rightarrow B\times F is a proper biharmonic map if and only if b is a non-constant solution of0=-\frac{1}{f^{2}}J_{\varphi }(d\varphi ({grad}\ln b))+\frac{n}{2}{grad}(|d\varphi ({grad}\ln b)|^{2})and f is a non-constant solution of0=\frac{1}{b^...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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237ab387730937d4bd4dbfd810152678434fba53
subsection
17
18
Product maps
We will see that the energy density of the harmonic map \varphi :F\rightarrow F has an important role for the biharmonicity of the product map \widehat{\Psi }=\widehat{I_{B}\times \varphi }. We haveTheorem 5.3 Let (B,g_{B}) and (F,g_{F}) be Riemannian manifolds of dimensions m and n, respectively and let b:B\rightarrow...
{ "cite_spans": [] }
0807.1836
Biharmonic maps between doubly warped product manifolds
[ "Selcen Yüksel Perktaş", "Erol Kılıç" ]
[ "math.DG" ]
2,008
en
Mathematics
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0f96e2fb9f259f4f7e3a90c27fd97afa7eebb72c
abstract
0
6
Abstract
We find evidence for decaying magnons at strong magnetic field in the square lattice spin-1/2 Heisenberg antiferromagnet. The results are obtained using Quantum Monte Carlo simulations combined with a Bayesian inference technique to obtain dynamics and are consistent with predictions from spin wave theory.
{ "cite_spans": [] }
10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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21487a890055c1763829f9c066648cc233baba8b
subsection
1
6
Body
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice Olav F. Syljuåsen Department of Physics, University of Oslo, P. O. Box 1048 Blindern, N-0316 Oslo, Norway75.10.Jm,05.10.Ln,75.40.Gb,75.50.EeWe find evidence for decaying magnons at strong magnetic field in the...
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10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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24038f44c99e6961e2f0b96338672444239cad35
subsection
2
6
Body
Thus the spinon picture works well for explaining the (\pi ,0) anomaly qualitatively, however being essentially a projected mean field calculation it is not of the level of precision needed in order to compare quantitative details with exact results and conventional spin wave theory.In a magnetic field the distinction ...
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10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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5bee322ffbb2771c503f07d104793431e23a9343
subsection
3
6
Body
In contrast the antiferromagnetic signal at (\pi ,\pi ) remains even at high magnetic fields for the transverse spin components. For high fields note that D^{\alpha }(\vec{q},0) becomes nearly independent of \vec{q} except close to \vec{q}=0 and \vec{q}=(\pi ,\pi ) for the longitudinal and transverse polarization respe...
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10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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6c0c09ffc2dd3cff34bfa5dc32f8c9b63c38eb61
subsection
4
6
Body
(REF ) in a canted coordinate system, characterized by the canting angle \theta , and expressing the spin operators by boson operators according to the Holstein-Primakoff transformation one gets terms with all orders of bosonic creation and annihilation operators, including linear and cubic terms. Minimizing the energy...
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10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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7c242dd649ae53c77f061f6d76972785c27f8bd6
subsection
5
6
Body
Here the system size is L=16 and the inverse temperature is \beta J=200.]For magnetic fields above H \approx 3J the self-energy \Sigma acquires an imaginary part due to decay of magnons thru the three-boson vertex in Eq. (REF ). This implies that the perturbation expression Eq. (REF ) will not work well for finding the...
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10.1103/PhysRevB.78.180413
0807.1837
Numerical evidence for unstable magnons at high fields in the Heisenberg antiferromagnet on the square lattice
[ "Olav F. Syljuasen" ]
[ "cond-mat.str-el" ]
2,008
en
Physics
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abstract
0
22
Abstract
There is presented an algorithm for computing the topological degree for a large class of polynomial mappings. As an application there is given an effective algebraic formula for the intersection number of a polynomial immersion M --> R^2m, where M is an m-dimensional algebraic manifold.
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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2eda50bef775bff12d8063ad351f0d686863d248
subsection
1
22
Quotients of ideals in
Lemma 1.1 Let f_1,\ldots ,f_r be polynomials with real coefficients. Let S_{\mathbb {R}} (resp. S_{) denote the ideal in \mathbb {R}[x] (resp. x]) generated by f_1,\ldots ,f_r. Then \begin{} \item [(i)] S_{\mathbb {R}}=S_{\cap \mathbb {R}[x], \item [(ii)]S_{\mathbb {R}}=\mathbb {R}[x]\Leftrightarrow S_{=x]. } } {\em P...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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0f1f4b489ae8a2c3370c195dc1b74114353919aa
subsection
2
22
Quotients of ideals in
Of course J_{\mathbb {R}}:I_{\mathbb {R}}=\lbrace h\in \mathbb {R}[x]: hg_i \in J_{\mathbb {R}}, \quad \textrm {for each} \quad 1 \le i \le s\rbrace J_{:I_{=\lbrace h\in x]: hg_i \in J_{, \quad \textrm {for each} \quad 1 \le i \le s\rbrace . }Take h\in (J_{\mathbb {R}}:I_{\mathbb {R}})_{, then there exist w_1, \ldots ...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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subsection
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22
Quotients of ideals in
\hfill \Box }If S_{\mathbb {K}} is an ideal in \mathbb {K}[x], where \mathbb {K} is either or \mathbb {R}, denote V(S_{\mathbb {K}})=\lbrace p\in \mathbb {K}^n\ :\ f(p)=0\ \mbox{for all}\ f\in S_{\mathbb {K}}\rbrace . }Consider ideals J_{\mathbb {R}}\subset I_{\mathbb {R}} \subset \mathbb {R}[x], such that \dim _{\mat...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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4980e07e50fb1b95a6e537c34b47974508b12aa0
subsection
4
22
Quotients of ideals in
For p\in V(J_{)\setminus V(I_{) , we define an -algebra \mathcal {A}_{p}:=\frac{x]}{J_{+m_{p}^k}, \quad \textrm {where} \quad m_{p}=\lbrace f\in x]:f(p)=0\rbrace . Of course, f\in J_{+m_{p}^k if and only if \overline{f}\in J_{+m_{\overline{p}}^k. In particular \begin{equation} \mathbb {R}[x]\cap (J_{+m_{p}^k)=\mathbb {...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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subsection
5
22
Quotients of ideals in
Using Lemma \ref {postac j:i 2} and (\ref {wazne1}) we get \begin{align*} \ker \pi & = \mathbb {R}[x] \cap \bigcap _{i=1}^m (J_{\mathbb {R}}+m_{\mathbb {R},p_i}^k) \cap \bigcap _{j=1}^r (J_{+m_{q_j}^k)=\\ & =\mathbb {R}[x] \cap \bigcap _{i=1}^m (J_{\mathbb {R}}+m_{\mathbb {R},p_i}^k)_{ \cap \bigcap _{j=1}^r (J_{+m_{q_j...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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subsection
6
22
Quotients of ideals in
For p\in \mathbb {K}^n, let {\cal O}_{\mathbb {K},p} denote the ring of germs at p of analytic functions \mathbb {K}^n\longrightarrow \mathbb {K}. There is a natural homomorphism \eta :\mathbb {K}[x]=\mathbb {K}[x_1, \ldots ,x_n]\longrightarrow {\cal O}_{\mathbb {K},p}. Let m_{\mathbb {K},p}=\lbrace f\in \mathbb {K}[x]...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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subsection
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22
Quotients of ideals in
If that is the case then p is isolated in V(S_{\mathbb {R}}), and \eta (m^k_{\mathbb {K},p}) \subset S_{\mathbb {K},p} for all k large enough. \begin{} If p\in V(S_{\mathbb {K}}) is isolated in H_{^{-1}(0) and S_{\mathbb {K},p}=J_{\mathbb {K},p}, then \eta induces an isomorphism of \mathbb {K}--algebras \eta : \mathbb ...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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0d8d16199b3088b8e2a23dbb8a0fa1517e5a595b
subsection
8
22
Quotients of ideals in
Obviously, {\mathcal {B}} is a finite dimensional \mathbb {R}--algebra. }}Let u\in \mathbb {R}[x], and let \varphi :{\mathcal {B}} \longrightarrow \mathbb {R} be a linear functional. Then there are bilinear symmetric forms \Phi ,\,\Psi :{\mathcal {B}} \times {\mathcal {B}}\longrightarrow \mathbb {R} given by \Phi (a,b)...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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3b13e413b4df899210c38007dce96b6279e35943
subsection
9
22
Quotients of ideals in
There is the natural projection \mathbb {R}[x,x^{\prime }]\longrightarrow {\mathcal {B}}\otimes {\mathcal {B}} given by x_1^{\alpha _1}\cdots x_n^{\alpha _n}(x_1^{\prime })^{\beta _1}\cdots (x_n^{\prime })^{\beta _n} \mapsto x_1^{\alpha _1}\cdots x_n^{\alpha _n}\otimes (x_1^{\prime })^{\beta _1}\cdots (x_n^{\prime })^{...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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298505f4e36a23cdd4cde8ca34362092c467b26a
subsection
10
22
Quotients of ideals in
\end{} \hfill \Box \end{equation}}}\section {Topological degree} }Let h_1,\ldots ,h_n\in \mathbb {R}[x_1,\ldots ,x_n], and let H_{\mathbb {K}}=(h_1,\ldots ,h_n):\mathbb {K}^n\longrightarrow \mathbb {K}^n. Denote by J_{\mathbb {K}} the ideal in \mathbb {K}[x] generated by h_1,\ldots ,h_n, so that H_{^{-1}(0)=V(J_{). }A...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 127, 116115, 72295, 3611, 13, 5490, 2320, 58994, 77888, 109622, 79385, 124480, 1096, 115187, 30591, 454, 19, 1052, 2633, 572, 605, 125458, 262, 48345, 821, 6397, 425, 139392, 5759, 177609, 1369, 856, 132, 1375, 24854, 66596, 2685, 142, 87, ...
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95a0ac3b62fc2a85e76c00a88999f16f1162adcd
subsection
11
22
Quotients of ideals in
Hence each point p\in V(S_{)=H_{^{-1}(0)\setminus V(I_{) satisfies the assumptions of Lemma \ref {pi indukuje}. }Put H_{\mathbb {R}}^{-1}(0)\setminus V(I_{\mathbb {R}})=\lbrace p_1,\ldots ,p_m\rbrace and (H_{^{-1}(0)\setminus V(I_{))\setminus \mathbb {R}^n= \lbrace q_1,\overline{q_1},\ldots ,q_r,\overline{q_r}\rbrace \...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 6620, 12638, 6275, 915, 73, 310, 294, 454, 1369, 841, 5759, 177609, 3509, 34731, 40407, 3387, 237259, 7, 636, 18023, 29087, 1434, 116401, 1411, 27559, 572, 5125, 1052, 99407, 115187, 30591, 8096, 5465, 75358, 581, 58391, 73079, 299, 445, ...
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1f689b4a67f3f2ebaa2f1b83e0864daa33c8610d
subsection
12
22
Quotients of ideals in
\end{} \hfill \Box }Let \Psi _T be the bilinear form on \mathcal {A} given by \Psi _T(a,b)=\varphi _T(uab). Using the same arguments as in \cite [Theorem 1.5, p. 304]{Szafraniec} one may prove \begin{} \Psi _T is non-degenerate if and only if u(p)\ne 0 for each p\in H_{^{-1}(0)\setminus V(I_{). If that is the case the...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 116115, 72295, 124480, 683, 172, 101, 618, 186, 43286, 28575, 3173, 98, 125458, 6827, 284, 34475, 275, 1961, 19379, 34, 2055, 5701, 10750, 47959, 58391, 22410, 112986, 6000, 133110, 1543, 23534, 351, 112, 48281, 2174, 75, 254, 757, 12638, ...
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e0e51579145115e2317e15658689726193b044bf
subsection
13
22
Quotients of ideals in
According to the Lashof and Smale \cite [Theorem 3.1]{LashofSmale}, d(G)=2I(g). }Now assume that f=(f_1,\ldots \,f_n):\mathbb {R}^{n+m} \longrightarrow \mathbb {R}^n is a C^1 mapping, such that M=f^{-1}(0) and M is a complete intersection, i.e. for each p\in M the rank of Df(p) equals n. }We shall say that vectors v_1,...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 129551, 70, 5599, 21676, 136, 159, 49100, 47959, 3957, 58391, 45151, 2729, 7, 104, 724, 55257, 568, 177, 41591, 1238, 420, 115187, 30591, 19, 125458, 5125, 1052, 1328, 39, 54969, 118201, 83, 10, 313, 8353, 418, 291, 26783, 276, 5759, 17...
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b856734985cb096bc239ee3819c9a8f513e0599d
subsection
14
22
Quotients of ideals in
As \operatorname{rank}\left[ \begin{array}{c} D\overline{g}\\ Df\\ \end{array} \right]=\operatorname{rank}\left[ \begin{array}{ccc} 1 & 0 & 0\\ 0 & 1 & 0\\ z & 0 & x\\ 0 & z & y\\ 2x & 2y & 2z\\ \end{array} \right] has a non-zero (3\times 3)--minor at each point p\in \mathbb {R}^3\setminus \lbrace 0\rbrace , then g=\ov...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 1301, 206469, 11627, 36467, 8152, 2480, 6, 372, 6820, 19305, 24854, 238, 391, 5465, 2256, 177, 420, 13273, 41872, 3611, 53, 54969, 268, 1369, 133, 10060, 106, 619, 757, 97, 1022, 113, 116, 425, 169, 1556, 10, 351, 80510, 6896, 70141, ...
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43c6ce1ac87aeb5903f53bec20e93f0b02aca94b
subsection
15
22
Quotients of ideals in
\end{} \hfill \Box }A homotopy h_t\colon M\longrightarrow \mathbb {R}^{2m} is called \emph {a regular homotopy}, if at each stage it is an immersion and the induced homotopy of the tangent bundle is continuous. }As in \cite {whitneySelfInter} we say that an immersion g\colon M\longrightarrow \mathbb {R}^{2m} has \emph...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 116115, 72295, 284, 12840, 13784, 53, 1096, 18, 22796, 276, 1052, 304, 39, 35839, 195, 11727, 20324, 2174, 12638, 36541, 3807, 6889, 135989, 25269, 2517, 57134, 133, 62005, 47959, 11400, 10186, 104475, 44851, 5154, 706, 1556, 15970, 10433, ...
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2bb4882ee3059636b25288acdb7087ea0d0239f5
subsection
16
22
Quotients of ideals in
Then each self--intersection is represented by a single point in H^{-1}(0)\cap \lbrace u>0\rbrace \setminus \Delta . }\begin{} Suppose that m>1 is odd, and \begin{} \item [(a)] M=f^{-1}(0) is an oriented, compact m--dimensional complete intersection, \item [(b)] g=\overline{g}|M\colon M\longrightarrow \mathbb {R}^{2m} ...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 47009, 12638, 15970, 9, 10433, 7, 58994, 83, 33636, 297, 390, 11001, 6275, 23, 572, 8353, 5759, 177609, 15644, 99407, 75, 2389, 3509, 34731, 58598, 102, 121691, 8364, 347, 2740, 418, 70270, 6820, 217, 276, 420, 142, 23509, 94928, 157955, ...
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deee7b7322f716792d2f8cdb39774d963f2646b1
subsection
17
22
Quotients of ideals in
\hfill \Box }}If f_1,\ldots ,f_n,g_1,\ldots ,g_{2m} are polynomials then H=(h_1,\ldots ,h_{2n+2m}) is a polynomial mapping. Let J_{\mathbb {R}} denote the ideal in \mathbb {R}[x,y]=\mathbb {R}[x_1,\ldots ,x_{n+m}, y_1,\ldots ,y_{n+m}] generated by h_1,\ldots ,h_{2n+2m}, and I_{\mathbb {R}} the one generated by f_1(x),...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 127, 116115, 72295, 47391, 91306, 1238, 115187, 30591, 420, 454, 19, 177, 304, 39, 621, 35874, 1687, 15403, 7, 7068, 572, 1369, 54651, 83, 10, 291, 26783, 10842, 821, 125458, 5125, 1052, 8, 48345, 70, 6397, 53, 1328, 113, 7344, 139392, ...
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0695419203a1e7627ffb28009e938b1c07826346
subsection
18
22
Quotients of ideals in
As a consequence of Theorem \ref {teczka} and Proposition \ref {odd} we get \begin{} If m>1 is odd and \det [\Psi ]\ne 0, then I(g)\equiv \dim _{\mathbb {R}}\mathcal {A}+1+(\operatorname{sgn}\det [\Phi ]+\operatorname{sgn}\det [\Psi ])/2\mod {2}. \end{} \hfill \Box }}}\begin{} Let us consider the mapping g=(g_1,g_2,g_...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
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5477989f944a996e3f5f0e1b10cc92d7f13a4624
subsection
19
22
Quotients of ideals in
Then A_1=-\frac{1}{8}, A_2=0, so for any a=a_1+a_2y_3=a_1e_1+a_2e_2 in \mathcal {A}, \varphi _T is given by \varphi _T(a)=-\frac{a_1}{8}. Then the matrix of \Phi _T is given by \left[ \begin{array}{cc} -\frac{1}{8} & 0 \\0 & -\frac{1}{8} \end{array} \right], so \operatorname{signature}\Phi _T=-2, and as a consequence o...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 62, 115187, 1369, 9, 132076, 418, 1019, 454, 304, 145407, 2499, 10, 11, 1328, 53, 363, 13, 125458, 6827, 284, 1961, 19379, 618, 34475, 50944, 425, 45689, 14, 101, 2480, 19305, 10060, 757, 2389, 54969, 206469, 11627, 137432, 5428, 179804, ...
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b2da8f95f8e591c0a77e255e59fa17551452f137
subsection
20
22
Quotients of ideals in
Of course \det [\Psi ]\ne 0, and as consequence of Theorem \ref {nowe2} we get I(g|_{S^3(1)})\equiv 2+1+\frac{1}{2}(-1+1) \equiv 1\ \mod {2} . } }Using similar methods we have computed some more difficult examples: \begin{} h(x_1,x_2,x_3)==(2x_1x_2+x_2,2x_1x_3+4x_3,4x_3^2+5x_2,5x_2^2+4x_3) is an immersion on the 2-dime...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 6619, 15411, 6, 41872, 3667, 683, 172, 86, 757, 179804, 581, 58391, 29087, 2600, 304, 642, 2046, 87, 177, 58745, 454, 294, 8353, 363, 27750, 8152, 16, 13, 3181, 116, 21748, 1328, 132076, 132, 5759, 334, 106, 13415, 51912, 21373, 150624,...
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d707eb6ebd1475dd44ac979598ac155669296982
subsection
21
22
Quotients of ideals in
In that case \dim _{\mathbb {R}}\mathcal {A}=18, and I(h|_{S^3(1)})\equiv 1\ \mod {2}. \end{} }}\begin{}{00} \end{}\bibitem {BCRSz}E.~Becker, J.P.~Cardinal, M.F.~Roy, and Z.~Szafraniec, Multivariate Bezutians, Kronecker symbol and Eisenbud-Levine formula, Progress in Mathematics, vol.143, 1996, p. 79-104, \bibitem {Cox...
{ "cite_spans": [] }
0807.1838
An algebraic formula for the intersection number of a polynomial immersion
[ "Iwona Karolkiewicz", "Aleksandra Nowel", "Zbigniew Szafraniec" ]
[ "math.AG" ]
2,008
en
Mathematics
[ 360, 450, 7225, 6, 41872, 5771, 24854, 125458, 5125, 1052, 47391, 284, 8152, 1369, 1819, 4, 136, 87, 127, 58745, 454, 294, 8353, 363, 27750, 16, 13, 3181, 334, 106, 13415, 10666, 304, 5, 372, 6820, 7049, 127872, 2982, 24318, 15396, 16...
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a35ddc9b72b79bbfe830818271c986823547c9c5
abstract
0
7
Abstract
Using the Vlasov-wave formalism, it is shown that self-consistency vanishes in the plateau regime of the bump-on-tail instability if the plateau is broad enough. This shows that, in contrast with the "turbulent trapping" Ansatz, a renormalization of the Landau growth rate or of the quasilinear diffusion coefficient is ...
{ "cite_spans": [] }
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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8f8c050eb0b5d7da6b50796506ea56419b518b54
subsection
1
7
Introduction
The saturation of the bump-on-tail instability is a tough problem of kinetic plasma physics, which is still the subject of a controversy , . It was originally tackled in the frame of the Vlasov-Poisson formalism through the quasilinear approximation that neglects mode coupling , . However mode coupling was proved to be...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 140, "openalex_id": "", "raw": "Laval G and Pesme D 1999 Controversies about quasilinear theory Plasma Phys. Control. Fusion 41 A239–A246", "source_ref_id": "1e965732bfeba799dccf03744bd2e886c2addf40", "start": 0 },...
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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e873b664bbc3f089a41b355a6d017ed5527363f4
subsection
2
7
Description of wave-particle self-consistency
The difficulty to describe the nonlinear regime of the Vlasov-Poisson system of equations, and the progress in the chaotic dynamics of Hamiltonian systems with a finite number of degrees of freedom were an incentive to tackle the description of the saturation regime with the so-called self-consistent Hamiltonian that d...
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0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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230088e11f8e208e60b31d8d9aadb9a2e34f92ce
subsection
3
7
Description of wave-particle self-consistency
Equation () makes clear the link between Z_j = X_j + {\mathrm {i}}Y_j and the electric field of wave j.For the present paper, it is easier to describe the tail particles through a velocity distribution function f(x,p,t). This is possible through the so-called Vlasov-wave model that is obtained as a mean-field limit (li...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 489, "openalex_id": "", "raw": "Firpo M-C and Elskens Y 1998 Kinetic limit of N-body description of wave-particle self-consistent interaction J. Stat. Phys. 93 193–209", "source_ref_id": "a2b0229db85773014c0b42ff5f7116bafd39...
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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c3d1e8369faf849a33df2211954ca4d19043ea10
subsection
4
7
Dynamics when the distribution is a plateau
This paper considers the dynamics defined by Eqs (REF -REF ), while starting at time t=0 from (i) a spectrum of Langmuir waves where all nearby waves are in resonance overlap and (ii) a spatially uniform plateau for the particle velocity distribution function over this overlap domain with a height f_0. We first start w...
{ "cite_spans": [] }
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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c2eb6ad79db6ae79e4d58c1bb819051a5f336522
subsection
5
7
Dynamics when the distribution is a plateau
The chaotic domain {\rm C} (t_0) in single-particle (Boltzmann or \mu ) phase space (x,p) defined by this frozen wave spectrum is bounded above and below in p by two KAM tori, respectively {\rm T_a} (t_0) and {\rm T_b} (t_0). The initial particle distribution function f(x,p,0) is assumed to be uniform on {\rm C} (0) ; ...
{ "cite_spans": [] }
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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0cd9c2c0d482e3325e151343a15800f1d201a838
subsection
6
7
Conclusion
We have just shown that self-consistency vanishes in the plateau regime of the bump-on-tail instability if the plateau is broad enough. This means that the diffusion coefficient D(p) of particles with momentum p is that found for the dynamics of particles in a prescribed spectrum of Langmuir waves. Let D_{\rm QL}(p) be...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 448, "openalex_id": "", "raw": "Cary J R, Escande D F and Verga A D 1990 Non quasilinear diffusion far from the chaotic threshold Phys. Rev. Lett. 65 3132–3135", "source_ref_id": "c98a4c32c8b0f47a5b2a53eb2fe86943557f9142", ...
0807.1839
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
[ "Dominique F. Escande", "Yves Elskens" ]
[ "physics.plasm-ph", "nlin.CD" ]
2,008
en
Physics
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08ddd2adf70285a016a43f8ceacaf1121ae64f8d
abstract
0
20
Abstract
In this work we show that single horizon black hole behaves as a "laser". It is in many aspects conceptually analogous to Corley and Jacobson work on the two horizon black hole "laser". We started by proposition that circumference of the black hole horizon holds the natural (integer) quantum number of corresponding red...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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82c2623735db420c4460b085742d26f59dc07608
subsection
1
20
Introduction
As it is known Corley and Jacobson [1] have shown that a two horizon boson black hole can behave as a "laser" that amplifies Hawking radiation. Precisely, Corley and Jacobson have shown that: "High energy frequency spectrum of the Hawking radiation from a single black hole horizon, whether the dispersion entails sublum...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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908661b1d19100a499ae08c4c000df7130e92f61
subsection
2
20
Introduction
Also ground state is practically totally occupied while other states are practically totally unoccupied that is a typical Bose condensation. Number of the systems in this condensate (multiplied by Boltzmann constant) represents black hole entropy which yields a simple explanation of the black hole entropy. Obviously, f...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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2bf1cbe4cc7042dd077219e52fd9b4f47b4a1c44
subsection
3
20
A simple determination of the black hole thermodynamical characteristics and a simple model of the black hole
Firstly, we shall shortly repeat our previous results [3]-[5].Analyze a Schwarzschild's black hole with mass M and Schwarzschild's radiusR = \frac{2GM}{c^{2}}where G represents Newtonian gravitational constant and c - speed of light.Introduce the following conditionm_{n}c R = n\frac{\hbar }{2p} \hspace{28.45274pt} {\rm...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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c81278434bfa95f993927c3974c43ba97e7828d1
subsection
4
20
A simple determination of the black hole thermodynamical characteristics and a simple model of the black hole
But, for a "microscopic" black hole, i.e. for M \le M_{P} it follows m_{1}\ge M_{P}\ge M.Define now the following\sigma = \frac{M}{ m_{1}} = 4\pi \frac{GM^{2}}{\hbar c}that, after multiplication by Boltzmann constant k_{B}, yieldsS = k_{B}\sigma = 4\pi k_{B} \frac{GM^{2}}{\hbar c} = k_{B}\frac{c^{3}}{4G\hbar }A = k_{B}...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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cc1bff4be56884b5ecfeda6efc0f614e50c7fc83
subsection
5
20
A simple determination of the black hole thermodynamical characteristics and a simple model of the black hole
Evidently, this temperature is identical to Hawking black hole temperature.Further, according to (8)-(10) it followsdA = (32\pi \frac{G^{2}}{c^{3}}) M dMor, in a corresponding finite difference form\Delta A = (32\pi \frac{G^{2}}{c^{3}}) M \Delta M \hspace{28.45274pt} {\rm for} \hspace{28.45274pt} \Delta M \ll M .Now, a...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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8c7c7aab1497306c264bb660a48085e485c4a8a7
subsection
6
20
A simple determination of the black hole thermodynamical characteristics and a simple model of the black hole
(But, as it has been already pointed out, there is a principal difference in respect to Bohr's atomic model.)In this way we have reproduced, i.e. determined exactly in a mathematically and physically simple way, three most important characteristics of Schwarzschild's black hole thermodynamics, Bekenstein-Hawking entrop...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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feea0effd9d70241026389d11bfd202abacc7fe6
subsection
7
20
Single horizon black hole "laser"
Now we shall demonstrate that suggested model of the black hole admits consistent theoretical description of the stimulated emission of the radiation by black hole.Suppose that s has been initially in some lower quantum state |E^{s}_{k}> and that higher quantum state |E^{s}_{n}> , for k < n, has been initially "empty",...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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8a272d9d2bb780c271f2ec00791445906f6a6ec0
subsection
8
20
Single horizon black hole "laser"
In this case L can be considered as reservoir.Then, as it is well-known, statistical sum can be presented by expressionZ = \sum _{n,N(n)=0}\exp [-N(n)\frac{E_{n}-\mu }{k_{B}T}] = \sum _{n=0} Z_{n} .Here \mu represents the chemical potential, N(n) - number of the systems in quantum state of the individual system |E^{s}_...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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cb8ada1b0435b32bcd51d281ee5190746e7b3713
subsection
9
20
Single horizon black hole "laser"
It implies that right hand of (29) can be approximated by first term in the sum. Namely, according to (17), (24), it follows<N>_{n}n \simeq n \exp [-2n] \simeq 0 \hspace{28.45274pt} {\rm for}\hspace{5.69046pt} {\rm large} \hspace{5.69046pt} n \hspace{28.45274pt} i.e. \hspace{5.69046pt}n \gg 1 .For this reason practical...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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80862de00d6de75e235990256bf8833464c25156
subsection
10
20
Single horizon black hole "laser"
It can be effectively treated as a Bose-Einstein condensation. Also, it points out unambiguously that here inverse population cannot exist, even not approximately. In other words, for a macroscopic black hole for one horizon there is no stimulated emission of the radiation.Also, it can be pointed out that for a macrosc...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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4133eb14d0c1e5f9f19246be6f85df45b5709f30
subsection
11
20
Single horizon black hole "laser"
In this way a microscopic bosonic black hole can be (partially) considered as a "laser".Suppose now that black hole, precisely s, can be considered as a great canonical statistical ensemble of the ideal, non-interacting Fermi-Dirac quantum systems.In this case, as it is well-known, it followsZ_{n} = (1 + \exp [-\frac{E...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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692b20788ebbcea442ea88d3fd9ca8f57214ca80
subsection
12
20
A simple solution of the information loss paradox
In distinction from spontaneous emission of the radiation, that is decoherent, stimulated emission of the radiation is coherent. It represents the general characteristics of the quantum theory and refers on the single horizon black hole too. Since by its Hawking evaporation any macroscopic black hole turns out in a mic...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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708514d1c0f84ebc1a79bdbf4798867b4282376f
subsection
13
20
A simple solution of the information loss paradox
On the other hand, SP as the sub-system of IN+SP, in respect to any characteristics sub-systemic measurement realized outside black hole horizon, is effectively described by mixture (51).In this way, before time moment of the total black hole evaporation by means of Hawking radiation, according to usual quantum mechani...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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8404b03bd3ac1dd1dabe90bbdc200d42cf60aeef
subsection
14
20
A simple solution of the information loss paradox
Then macroscopic black hole evaporation can be satisfactorily described by (48) including effective description of Hawking radiation by (51).But in the time moment when given black hole becomes microscopic and ST non-neglecting, evaporation process must be described in the more complex way, i.e. by a more complex than ...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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2b839ac461c0ad7e177539357a409a8c11b20ac8
subsection
15
20
A simple solution of the information loss paradox
Super-system IN+SP+ST or, simplifying, SP+ST, is, even after black hole, i.e. IN total evaporation, exactly completely described by pure, correlated quantum state (63) or (64), on the one hand. On the other hand, SP as a sub-system of the super-system, in respect to any characteristics sub-systemic measurement realized...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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5c43a9f726f42deb29fe808f35a3202bc9ffeeaa
subsection
16
20
Mass duality as T-duality
Previously suggested model of the black hole, according to which large system is surrounded by (statistical ensemble of the) small system on the horizon surface area, in some degree similar to atomic nucleus by electronic shell in Bohr atomic theory, is simple and intuitively clear. But this intuitive clearness, strict...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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84aeaaa3fc3d60ce1897325ca3a07d493faafbbd
subsection
17
20
Mass duality as T-duality
Or we can say that (58) and (59) are mutually dual in sense that (58) can be changed by (59) and vice versa by changing of m_{1} by M and vice versa.Moreover, left hand of the condition (2) for n=1, according to (1), can be transformed in the following waym_{1}c R = m_{1} \frac{2GM}{c^{2}} = Mc\frac{2Gm_{1}}{c^{2}}= Mc...
{ "cite_spans": [] }
0807.1840
Single Horizon Black Hole "Laser" and a Solution of the Information Loss Paradox
[ "Vladan pankovic", "Rade Glavatovic", "Simo Ciganovic", "Dusan Harper Petkovic", "Lovro Loka Martinovic" ]
[ "gr-qc", "astro-ph" ]
2,008
en
Physics
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