publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2019-07-05 | Propagation length of antiferromagnetic magnons governed by domain configurations | The compensated magnetic order and characteristic, terahertz frequencies of
antiferromagnetic materials makes them promising candidates to develop a new
class of robust, ultra-fast spintronic devices. The manipulation of
antiferromagnetic spin-waves in thin films is anticipated to lead to new exotic
phenomena such as s... | 1907.02751v2 |
2021-01-29 | Dynamically stable negative-energy states induced by spin-transfer torques | We investigate instabilities of the magnetic ground state in ferromagnetic
metals that are induced by uniform electrical currents, and, in particular, go
beyond previous analyses by including dipolar interactions. These instabilities
arise from spin-transfer torques that lead to Doppler shifted spin waves. For
sufficie... | 2101.12544v1 |
2021-12-17 | Combined unitary and symmetric group approach applied to low-dimensional spin systems | A novel combined unitary and symmetric group approach is used to study the
spin-$\frac{1}{2}$ Heisenberg model and related Fermionic systems in a
spin-adapted representation, using a linearly-parameterised Ansatz for the
many-body wave function. We show that a more compact ground state wave function
representation is o... | 2112.09594v1 |
2022-04-05 | Single domain stripe order in a high-temperature superconductor | The coupling of spin, charge and lattice degrees of freedom results in the
emergence of novel states of matter across many classes of strongly correlated
electron materials. A model example is unconventional superconductivity, which
is widely believed to arise from the coupling of electrons via spin
excitations. In cup... | 2204.02304v1 |
2022-10-04 | The BKT Transition and its Dynamics in a Spin Fluid | We study the effect of particle mobility on phase transitions in a spin fluid
in two dimensions. The presence of a phase transition of the BKT universality
class is shown in an off-lattice model of particles with purely repulsive
interaction employing computer simulations. A critical spin wave region $0 < T
< T_{\textr... | 2210.01838v1 |
2001-11-08 | Resonances and Quantum Scattering for the Morse Potential as a Barrier | Quantum scattering in the presence of a potential valley followed by a
barrier is examined for the case of a Morse potential, for which exact analytic
solutions to the Schr\UNICODE{0xf6}dinger equation are known in terms of
confluent hypergeometric functions. For our application the potential is
characterized by three ... | 0111027v2 |
2007-05-24 | Slow wave resonance in periodic stacks of anisotropic layers | We consider transmission band edge resonance in periodic layered structures
involving birefringent layers. Previously we have shown that the presence of
birefringent layers with misaligned in-plane anisotropy can dramatically
enhance the performance of the photonic-crystal Fabry-Perot resonator. It
allows to reduce its... | 0705.3495v3 |
2010-02-25 | A theory of MHD instability of an inhomogeneous plasma jet | A problem of the instability of an inhomogeneous axisymmetric plasma jet in a
parallel magnetic field is solved. The jet boundary becomes, under certain
conditions, unstable relative to magnetosonic oscillations (Kelvin-Helmholtz
instability) in the presence of a shear flow at the jet boundary. Because of
its internal ... | 1002.4700v1 |
2015-06-30 | Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. II- Numerical aspects | Transverse magnetohydrodynamic (MHD) waves are ubiquitous in the solar
atmosphere and may be responsible for generating the Sun's million-degree outer
atmosphere. However, direct evidence of the dissipation process and heating
from these waves remains elusive. Through advanced numerical simulations
combined with approp... | 1506.09108v1 |
2016-07-05 | Symmetry Breaking of Counter-Propagating Light in a Nonlinear Resonator | Light is generally expected to travel through isotropic media independent of
its direction. This makes it challenging to develop non-reciprocal optical
elements like optical diodes or circulators, which currently rely on
magneto-optical effects and birefringent materials. Here we present
measurements of non-reciprocal ... | 1607.01194v1 |
2018-05-01 | Pulsar giant pulse: coherent instability near light cylinder | Giant pulses (GPs) are extremely bright individual pulses of radio pulsar. In
microbursts of Crab pulsar, which is an active GP emitter, zebra-pattern-like
spectral structures are observed, which are reminiscent of the `zebra bands'
that are observed in type IV solar radio flares. However, band spacing linearly
increas... | 1805.00139v2 |
2018-07-26 | Resonant interaction of the electron beam with a synchronous wave in controlled magnetrons for high-current superconducting accelerators | A simplified analytical model of the resonant interaction of the beam of
Larmor electrons drifting in the crossed constant fields of a magnetron with a
synchronous wave providing a phase grouping of the drifting charge was
developed to optimize the parameters of an rf resonant injected signal driving
the magnetrons for... | 1807.10237v1 |
2020-08-06 | Resonant gravitational waves in dynamical Chern-Simons-axion gravity | In this paper, we consider dynamical Chern-Simons gravity with the
identification of the scalar field coupled though the Pontryagin density with
the axion dark matter, and we discuss the effects of the parametric resonance
on gravitational waves (GWs). When we consider GWs in a coherently oscillating
axion cloud, we co... | 2008.02764v2 |
2020-03-09 | Resonant and Scattering States in the $α+α$ System from the Non-Localized Cluster Model | The non-localized cluster model provides a new perspective on nuclear cluster
effects and has been applied successfully to study cluster structures in
various bound states and quasi-bound states (i.e., long-lived resonant states).
In this work, we extend the application scope of the non-localized cluster
model further ... | 2003.04313v1 |
2020-01-28 | Two-Path Phonon-Interference Resonance Induces a Stop Band in Silicon Crystal Matrix by Embedded Nanoparticles Array | In this work, we report a new stop-band formation mechanism by performing the
atomistic Green's function calculation and the wave-packet molecular dynamics
simulation for a system with germanium-nanoparticle array embedded in a
crystalline silicon matrix. When only a single nanoparticle is embedded, the
local resonance... | 2001.10321v1 |
2020-05-26 | Broadband Mie-driven random quasi-phase-matching | High-quality crystals without inversion symmetry are the conventional
platform to achieve optical frequency conversion via three wave-mixing. In bulk
crystals, efficient wave-mixing relies on phase-matching configurations, while
at the micro- and nano-scale it requires resonant mechanisms that enhance the
nonlinear lig... | 2005.12609v1 |
2021-09-02 | Resonant triad interactions in stably-stratified uniform shear flow | We investigate exact and near resonant triad interactions (RTI) in a
two-dimensional stably stratified uniform shear flow confined between two
infinite parallel walls in the absence of viscous and diffusive effects. RTI
occur when three interacting waves satisfy the resonance conditions of the form
$k_1 \pm k_2 = k_3$ ... | 2109.00807v1 |
2005-05-23 | Anisotropy of incommensurate spin and charge fluctuations in detwinned YBa$_2$Cu$_3$O$_{6+δ}$ | Motivated by a recent neutron scattering experiment on detwinned
YBa$_2$Cu$_3$O$_{6+\delta}$ superconductor, we examine the frequency and doping
dependence of the anisotropy in the spin and charge fluctuation arising from
the coupling between the plane and the chain. Starting from the two-dimensional
$t$-$t^{'}$-$J$ mo... | 0505545v1 |
2013-06-03 | Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under non-resonant ultra-low power optical excitation | We study experimentally the dependence of dynamic nuclear spin polarization
on the power of non-resonant optical excitation in two types of individual
neutral semiconductor quantum dots: InGaAs/GaAs and GaAs/AlGaAs. We show that
the mechanism of nuclear spin pumping via second order recombination of
optically forbidden... | 1306.0469v1 |
2015-01-05 | Heat Bath Algorithmic Cooling with Spins: Review and Prospects | Application of multiple rounds of Quantum Error Correction (QEC) is an
essential milestone towards the construction of scalable quantum information
processing devices. However, experimental realizations of it are still in their
infancy. The requirements for multiple round QEC are high control fidelity and
the ability t... | 1501.00952v1 |
2017-11-28 | Electron paramagnetic resonance spectroscopy using a single artificial atom | Electron paramagnetic resonance (EPR) spectroscopy is an important technology
in physics, chemistry, materials science, and biology. Sensitive detection with
a small sample volume is a key objective in these areas, because it is crucial,
for example, for the readout of a highly packed spin based quantum memory or
the d... | 1711.10148v1 |
2019-06-24 | Itinerancy-dependent non-collinear spin textures in SrFeO3, CaFeO3, and CaFeO3/SrFeO3 heterostructures probed via resonant x-ray scattering | Non-collinear, multi-q spin textures can give rise to exotic, topologically
protected spin structures such as skyrmions, but the reason for their formation
over simple single-q structures is not well understood. While lattice
frustration and the Dzyaloshinskii-Moriya interaction are known to produce
non-collinear spin ... | 1906.09998v1 |
2021-02-02 | Anomalous light-induced broadening of the spin-noise resonance in cesium vapor | We uncover a highly nontrivial dependence of the spin-noise (SN) resonance
broadening induced by the intense probe beam. The measurements were performed
by probing the cell with cesium vapor at the wavelengths of the transition
${6}^2S_{1/2} \leftrightarrow {6}^2P_{3/2}$ ($\mathrm{D}_2$ line) with the
unresolved hyperf... | 2102.01679v2 |
2016-11-28 | Three-electron spin qubits | The goal of this article is to review the progress of three-electron spin
qubits from their inception to the state of the art. We direct the main focus
towards the resonant exchange (RX) qubit and the exchange-only qubit, but we
also discuss other qubit implementations using three electron spins. For each
three-spin qu... | 1611.09106v1 |
2017-04-03 | Spin-Mechanical Scheme with Color Centers in Hexagonal Boron Nitride Membranes | Recently observed quantum emitters in hexagonal boron nitride (hBN) membranes
have a potential for achieving high accessibility and controllability thanks to
the lower spatial dimension. Moreover, these objects naturally have a high
sensitivity to vibrations of the hosting membrane due to its low mass density
and high ... | 1704.00638v2 |
2019-08-29 | Tuning Single-Atom Electron Spin Resonance in a Vector-Magnetic Field | Spin resonance of single spin centers bears great potential for chemical
structure analysis, quantum sensing and quantum coherent manipulation.
Essential for these experiments is the presence of a two-level spin system
whose energy splitting can be chosen by applying a magnetic field. In recent
years, a combination of ... | 1908.11061v1 |
2019-11-30 | Quadrupole Effects on Nuclear Magnetic Resonance Gyroscopes | Nuclear magnetic resonance gyroscopes that detect rotation as a shift in the
precession frequency of nuclear spins, have attracted a lot of attentions.
Under a feedback-generated drive, the precession frequency is supposed to be
dependent only on the angular momentum and an applied magnetic field. However,
nuclei with ... | 1912.00216v1 |
2022-01-11 | Resonant Precession of Magnetization and Precession -- Induced DC voltages in FeGaB Thin Films | Measurements of frequency dependent ferromagnetic resonance (FMR) and spin
pumping driven dc voltage (V_{dc}) are reported for amorphous films of
Fe_{78}Ga_{13}B_{9} (FeGaB) alloy to address the phenomenon of self-induced
inverse spin Hall effect (ISHE) in plain films of metallic ferromagnets. The
V_{dc} signal, which ... | 2201.03739v1 |
1996-06-06 | Resonant interactions in Bénard-Marangoni convection in cylindrical containers | Convection in a cylindrical container of small aspect ratio is studied. It is
known that when, in addition to buoyancy forces, thermocapillarity effects are
taken into account, resonant interactions of two modes may appear. In the case
of 1:2 resonance amplitude equations are derived, showing the existence of a
stable ... | 9605016v1 |
1999-02-01 | Quantum resonances and decay of a chaotic fractal repeller observed using microwaves | The quantum resonances of classically chaotic n-disk geometries were studied
experimentally utilizing thin 2-D microwave geometries. The experiments yield
the frequencies and widths of low-lying resonances, which are compared with
semiclassical calculations. The longtime or small energy behavior of the
wave-vector auto... | 9902002v2 |
2001-04-12 | Fano and Kondo resonance in electronic current through nanodevices | Electronic transport through a quantum dot strongly coupled to electrodes is
studied within a model with two conduction channels. It is shown that multiple
scattering and interference of transmitted waves through both channels lead to
Fano resonance associated with Kondo resonance. Interference effects are also
pronoun... | 0104217v3 |
2001-06-18 | Mechanism of pseudogap probed by a local impurity | The response to a local strong non-magnetic impurity in the pseudogap phase
is examined in two distinctly different scenarios: phase-fluctuation (PF) of
pairing field and d-density-wave (DDW) order. In the PF scenario, the resonance
state is generally double-peaked near the Fermi level, and is abruptly
broadened by vor... | 0106327v4 |
2001-11-15 | Stochastic resonance in a model of opinion formation on small-world networks | We analyze the phenomenon of stochastic resonance in an Ising-like system on
a small-world network. The system, which is subject to the combined action of
noise and an external modulation, can be interpreted as a stylized model of
opinion formation by imitation under the effects of a ``fashion wave''. Both
the amplitud... | 0111289v1 |
2002-05-03 | Spatial Solitons and Anderson Localization | Stochastic (Anderson) localization is the spatial localization of the
wave-function of quantum particles in random media. We show, that a
corresponding phenomenon can stabilize spatial solitons in optical resonators:
spatial solitons in resonators with randomly distorted mirrors are more stable
than in perfect mirror r... | 0205061v2 |
2003-05-17 | Resonant scattering of solitons | We study the scattering of solitons in the nonlinear Schroedinger equation on
local inhomogeneities which may give rise to resonant transmission and
reflection. In both cases, we derive resonance conditions for the soliton's
velocity. The analytical predictions are tested numerically in regimes
characterized by various... | 0305410v1 |
2006-08-01 | Coherent magnetotransport spectroscopy in an edge-blocked double quantum wire with window and resonator coupling | We propose an electronic double quantum wire system that contains a pair of
edge blocking potential and a coupling element in the middle barrier between
two ballistic quantum wires. A window and a resonator coupling control between
the parallel wires are discussed and compared for the enhancement of the
interwire trans... | 0608027v1 |
1998-01-05 | Noisy Spherical Resonant Detector of Gravitational Waves: Veto on the Longitudinal Part of the Signal | The equations of a resonant sphere in interaction with $N$ secondary radial
oscillators (transducers) on its surface have been found in the context of
Lagrangian formalism. It has been shown the possibility to exert a veto against
spurious events measuring the longitudinal component of a signal. Numerical
simulations h... | 9801006v1 |
2005-04-22 | Test of constancy of speed of light with rotating cryogenic optical resonators | A test of Lorentz invariance for electromagnetic waves was performed by
comparing the resonance frequencies of two optical resonators as a function of
orientation in space. In terms of the Robertson-Mansouri-Sexl theory, we obtain
$\beta-\delta-1/2=(+0.5\pm 3\pm 0.7) E-10$, a ten-fold improvement compared to
the previo... | 0504109v1 |
1992-06-03 | Resonance Scattering Phase Shifts in a 2-d Lattice Model | We study a simple 2-d model representing two fields with different mass and a
3-point coupling term. The phase shift in the resonating 2-particle channel is
determined from the energy spectrum obtained in Monte Carlo simulations on
finite lattices. Masses and wave function renormalization constants of the
fields as wel... | 9206004v1 |
1994-11-29 | $τ\to πK ν$ Decay and $πK$ Scattering | Using chiral low energy theorems and elastic unitarity assumption, the
$\tau\to\pi K \nu $ decay is investigated. The vector and scalar $\pi K$ form
factors are calculated. It is found that the $\pi K$ spectrum is dominated by
the $K^*$ resonance. By measuring the forward-backward asymmetry, it is shown
that the S wave... | 9411423v1 |
1998-12-31 | Gamma photons from parametric resonance in neutron stars | Shock waves in cold nuclear matter, e.g. those induced by a collision of two
neutron stars, can generate a large number of gamma photons via parametric
resonance. We study the resonant production of gamma rays inside a shocked
neutron star and discuss the possible astrophysical consequences of this
phenomenon. | 9812534v2 |
2003-01-13 | Variation of the relative yield of charged and neutral B mesons across the Upsilon(4S) resonance | It is shown that the ratio of the production rates of the pairs (B+ B-) and
(B0 anti-B0) should experience a substantial and rapid variation with energy
within the width of the Upsilon(4S) resonance, crossing the value of one near
the center of the resonance. This behavior is due to an interference of the
rapidly chang... | 0301076v1 |
2006-11-20 | Photon - Axion Conversion Cross Sections in a Resonant Cavity | Photon - axion conversions in the resonant cavity with the lowest mode are
considered in detail by the Feynman diagram method. The differential cross
sections are presented and numerical evaluations are given. It is shown that
there is a resonant conversion for the considered process, in which the
conversion cross sect... | 0611258v1 |
2007-01-27 | Partial waves and large $N_C$ resonance sum rules | Using $1/N_C$ expansion and dispersion theory techniques, without relying on
any explicit resonance lagrangian, we generalize the KSRF relation beyond the
leading chiral order. Two sum rules for the low energy constants $L_2$, $L_3$
and a new relation between resonance couplings are derived. A rather detailed
examinati... | 0701232v2 |
2006-07-24 | Above Barrier Dirac Multiple Scattering and Resonances | We extend an above barrier analysis made with the Schrodinger equation to the
Dirac equation. We demonstrate the perfect agreement between the barrier
results and back to back steps. This implies the existence of multiple (indeed
infinite) reflected and transmitted wave packets. These packets may be well
separated in s... | 0607175v1 |
2004-08-26 | Schrödinger operators with complex-valued potentials and no resonances | In dimension $d\geq 3$, we give examples of nontrivial, compactly supported,
complex-valued potentials such that the associated Schr\"odinger operators have
no resonances. If $d=2$, we show that there are potentials with no resonances
away from the origin. These Schr\"odinger operators are isophasal and have the
same s... | 0408052v1 |
2004-10-20 | Fano resonance in quadratic waveguide arrays | We study resonant light scattering in arrays of channel optical waveguides
where tunable quadratic nonlinearity is introduced as nonlinear defects by
periodic poling of single (or several) waveguides in the array. We describe
novel features of wave scattering that can be observed in this structure and
show that it is a... | 0410041v2 |
2005-07-14 | Enhanced soliton transport in quasi-periodic lattices with short-range aperiodicity | We study linear transmission and nonlinear soliton transport through
quasi-periodic structures, which profiles are described by multiple modulation
frequencies. We show that resonant scattering at mixed-frequency resonances
limits transmission efficiency of localized wave packets, leading to radiation
and possible trap... | 0507027v1 |
2005-01-24 | Physics at ELSA, achievements and future | At ELSA interesting results on baryon resonances have been obtained by the
CB-ELSA, the CBELSA/TAPS and the SAPHIR collaborations. New resonances were
found, in particular a new $\rm D_{15}(2070)$ decaying into $p\eta$, was
recently observed by the CB-ELSA experiment. The availability of a polarized
beam and a polarize... | 0501024v1 |
1995-09-04 | Updated resonance photo-decay amplitudes to 2 GeV | We present the results of an energy-dependent and set of single-energy
partial-wave analyses of single-pion photoproduction data. These analyses
extend from threshold to 2 GeV in the laboratory photon energy, and update our
previous analyses to 1.8 GeV. Photo-decay amplitudes are extracted for the
baryon resonances wit... | 9509005v1 |
1999-04-01 | Evidence for the fourth P11 resonance predicted by the constituent quark model | It is pointed out that the third of five low-lying P11 states predicted by a
constituent quark model can be identified with the third of four states in a
solution from a three-channel analysis by the Zagreb group. This is one of the
so-called ``missing'' resonances, predicted at 1880 MeV. The fit of the Zagreb
group to... | 9904005v2 |
2000-10-18 | The NN Phase Shifts <3 GeV and Resonance Features | Solutions SP00, SM00 and FA00 of nucleon-nucleon (NN) phase shift analyzes by
Arndt et al. are used in optical model studies. The partial waves, single
channels J.leq.7 and coupled channels J.leq.6, are scrutinized. The radial
probability distributions and losses of flux are used to identify the known
Delta and N* reso... | 0010058v1 |
2004-12-21 | Monopole and quadrupole polarization effects on the alpha-particle description of $^{8}$Be | We investigate the effect of monopole and quadrupole modes on the elastic
alpha-alpha resonance structure of $^{8}$Be. To this end we make a fully
microscopic coupled channels calculation with three coupled channels, using the
Algebraic Model. The continuum spectrum and wave functions are analyzed in
terms of the indiv... | 0412086v1 |
2002-07-25 | Collision rates in near-resonant optical lattices | We present a simple method to calculate the binary collision rate between
atoms in near-resonant optical lattices. The method is based on the Monte Carlo
wave function simulations and the collision rate is obtained by monitoring the
quantum flux beyond the average distance between the atoms. To illustrate the
usefulnes... | 0207105v1 |
2003-05-27 | Effects of boundary roughness on a Q-factor of whispering-gallery-mode lasing microdisk cavities | We perform numerical studies of the effect of sidewall imperfections on the
resonant state broadening of the optical microdisk cavities for lasing
applications. We demonstrate that even small edge roughness causes a drastic
degradation of high-Q whispering gallery (WG) mode resonances reducing their
Q-values by many or... | 0305111v1 |
2004-06-07 | Efficient excitation of cavity resonances of subwavelength metallic gratings | One dimensional rectangular metallic gratings enable enhanced transmission of
light for specific resonance frequencies. Two kinds of modes participating to
enhanced transmission have already been demonstrated : (i) waveguide modes and
(ii) surface plasmon polaritons (SPP). Since the original paper of Hessel and
Oliner ... | 0406028v1 |
2004-11-24 | Shape resonances in nested diffraction gratings | The diffraction problem of a plane wave impinging on a grating formed by
nested cavities is solved by means of the modal method, for $s$ and $p$
polarization modes. The cavities are formed by perfectly conducting sheets that
describe rectangular profiles. The electromagnetic response of the grating is
analyzed, paying ... | 0411223v1 |
2005-03-31 | High-contrast dark resonance on the D2 - line of 87Rb in a vapor cell with different directions of the pump - probe waves | We propose a novel method enabling to create a high-contrast dark resonance
in the 87Rb vapor D2-line. The method is based on an optical pumping of atoms
into the working states by a two-frequency, linearly-polarized laser radiation
propagating perpendicularly to the probe field. This new scheme is compared to
the trad... | 0503246v2 |
2005-06-01 | Multi-electron giant dipole resonances of atoms in crossed electric and magnetic fields | Multi-electron giant dipole resonances of atoms in crossed electric and
magnetic fields are investigated. Stationary configurations corresponding to a
highly symmetric arrangement of the electrons on a decentered circle are
derived, and a normal-mode stability analysis is performed. A classification of
the various mode... | 0506007v1 |
2005-12-23 | Induced radiation processes in single-bubble sonoluminescence | According to the recent revision of the theory of thermal radiation, thermal
black-body radiation has an induced origin. We show that in single-bubble
sonoluminescence thermal radiation is emitted by a spherical resonator,
coincident with the sonoluminescing bubble itself, instead of the ensemble of
elementary resonato... | 0512228v1 |
2006-10-03 | Enhanced Transmission and Reflection of Femtosecond Pulses by a Single Slit | We show that a physical mechanism responsible for the enhanced transmission
and reflection of femtosecond pulses by a single subwavelength nanoslit in a
thick metallic film is the Fabry-Perot-like resonant excitation of stationary,
quasistationary and nonstationary waves inside the slit, which leads to the
field enhanc... | 0610019v1 |
1999-09-15 | Repulsion of Resonance States and Exceptional Points | Level repulsion is associated with exceptional points which are square root
singularities of the energies as functions of a (complex) interaction
parameter. This is also valid for resonance state energies. Using this concept
it is argued that level anti-crossing (crossing) must imply crossing
(anti-crossing) of the cor... | 9909047v1 |
2002-10-26 | The quantum mechanical geometric phase of a particle in a resonant vibrating cavity | We study the general-setting quantum geometric phase acquired by a particle
in a vibrating cavity. Solving the two-level theory with the rotating-wave
approximation and the SU(2) method, we obtain analytic formulae that give
excellent descriptions of the geometric phase, energy, and wavefunction of the
resonating syste... | 0210182v1 |
2004-11-15 | Electric circuit networks equivalent to chaotic quantum billiards | We formulate two types of electric RLC resonance network equivalent to
quantum billiards. In the network of inductors grounded by capacitors squared
resonant frequencies are eigenvalues of the quantum billiard. In the network of
capacitors grounded by inductors squared resonant frequencies are given by
inverse eigen va... | 0411100v1 |
2007-06-21 | First Order Superfluid to Bose Metal Transition in Systems with Resonant Pairing | Systems showing resonant superfluidity, driven by an exchange coupling of
strength $g$ between uncorrelated pairs of itinerant fermions and tightly bound
ones, undergo a first order phase transition as $g$ increases beyond some
critical value $g_c$. The superfluid phase for $g \leq g_c$ is characterized by
a gap in the... | 0706.3143v1 |
2007-10-22 | Upper and lower bounds on resonances for manifolds hyperbolic near infinity | For a conformally compact manifold that is hyperbolic near infinity and of
dimension $n+1$, we complete the proof of the optimal $O(r^{n+1})$ upper bound
on the resonance counting function, correcting a mistake in the existing
literature. In the case of a compactly supported perturbation of a hyperbolic
manifold, we es... | 0710.3894v2 |
2007-11-23 | Resonant Fibonacci Quantum Well Structures | We propose a resonant one-dimensional quasicrystal, namely, a multiple
quantum well (MQW) structure satisfying the Fibonacci-chain rule with the
golden ratio between the long and short inter-well distances. The resonant
Bragg condition is generalized from the periodic to Fibonacci MQWs. A
dispersion equation for excito... | 0711.3769v1 |
2007-12-19 | Real stabilization method for nuclear single particle resonances | We develop the real stabilization method within the framework of the
relativistic mean field (RMF) model. With the self-consistent nuclear
potentials from the RMF model, the real stabilization method is used to study
single-particle resonant states in spherical nuclei. As examples, the energies,
widths and wave functio... | 0712.3087v1 |
2008-05-13 | Collisionless Absorption of Intense Laser Beams by Anharmonic Resonance | Two decades after the invention of chirped pulse amplification the physical
mechanism of collisionless absorption of intense laser radiation in overdense
matter is still not sufficiently well understood. We show that anharmonic
resonance in the self-generated plasma potential of the single plasma layers
(cold plasma mo... | 0805.1815v1 |
2008-08-12 | Resonant Transmission of Electromagnetic Fields through Subwavelength Zero-$ε$ Slits | We theoretically investigate the transmission of electromagnetic radiation
through a metal plate with a zero-$\epsilon$ metamaterial slit, where the
permittivity tends towards zero over a given bandwidth. Our analytic results
demonstrate that the transmission coefficient can be substantial for a broad
range of slit geo... | 0808.1635v1 |
2008-10-28 | Free-space Excitation of Resonant Cavities formed from Cloaking Metamaterial | We propose a new class of resonant electromagnetic structures, and study
their response to free-space illumination. The structures consist of partial
cylindrical shells that have cloaking material properties proposed by Pendry et
al. These metamaterial shells have apertures that allow the propagation of
incident irradi... | 0810.4961v1 |
2009-09-10 | Optical response of finite-length carbon nanotubes | Optical response of finite-length metallic carbon nanotubes is calculated
including effects of induced edge charges in a self-consistent manner. The
results show that the main resonance corresponding to excitation of the
fundamental plasmon mode with wave vector $\pi/l$ with $l$ being the tube
length is quite robust an... | 0909.1908v1 |
2009-10-09 | Entanglement and parametric resonance in driven quantum systems | We study the relationship between entanglement and parametric resonance in a
system of two coupled time-dependent oscillators. As a measure of bipartite
entanglement, we calculate the linear entropy for the reduced density operator,
from which we study the entanglement dynamics. In particular, we find that the
bipartit... | 0910.1600v1 |
2009-12-11 | Magneto-optical Feshbach resonance: Controlling cold collision with quantum interference | We propose a method of controlling two-atom interaction using both magnetic
and laser fields. We analyse the role of quantum interference between magnetic
and optical Feshbach resonances in controlling cold collision. In particular,
we demonstrate that this method allows us to suppress inelastic and enhance
elastic sca... | 0912.2170v2 |
2010-05-19 | Emerging beam resonances in atom diffraction from a reflection grating | We report on the observation of emerging beam resonances, well known as
Rayleigh-Wood anomalies and threshold resonances in photon and electron
diffraction, respectively, in an atom-optical diffraction experiment.
Diffraction of He atom beams reflected from a blazed ruled grating at grazing
incidence has been investiga... | 1005.3467v1 |
2010-05-28 | Electromagnetic and phonon modes for superfluid He-4 with a disk resonator | We find the distribution of the electromagnetic field inside and outside a
dielectric disk resonator placed in He-II. It is shown that this field consists
of a collection of "circular" (c-) photons. The wave function \Psi_c of a
c-phonon for the He-II + disk system is calculated in the zero-order
approximation in inter... | 1005.5282v1 |
2010-09-16 | Universal Optical Frequency Comb | We demonstrate that whispering gallery mode resonators can be utilized to
generate optical frequency combs based on four wave mixing process at virtually
any frequency that lies in the transparency window of the resonator host
material. We show theoretically how the morphology of the resonator can be
engineered to prod... | 1009.3286v1 |
2010-10-18 | Study of the double non linear quantum resonances in diatomic molecules | We study the quantum dynamics of diatomic molecule driven by a circularly
polarized resonant electric field. We look for a quantum effect due to
classical chaos appearing due to the overlapping of nonlinear resonances
associated to the vibrational and rotational motion. We solve the Schr\"odinger
equation associated wi... | 1010.3627v1 |
2010-10-28 | A single fermion in a Bose Josephson Junction | We consider the tunneling properties of a single fermionic impurity immersed
in a Bose-Einstein condensate in a double-well potential. For strong
boson-fermion interaction, we show the existence of a tunnel resonance where a
large number of bosons and the fermion tunnel simultaneously. We give
analytical expressions fo... | 1010.5979v1 |
2011-01-07 | Interaction of the Electromagnetic p-Wave with Thin Metal Film in the Field of Resonant Frequencies | It is shown that for thin metallic films thickness of which does not exceed
thickness of skin layer, the problem allows analytical solution. In the field
of resonant frequencies the analysis of dependence of coefficients of
transmission, reflection and absorbtion on an electromagnetic wave is carried
out. Dependence on... | 1101.1453v1 |
2011-02-08 | Space-time resonances | This article is a short exposition of the space-time resonances method. It
was introduced by Masmoudi, Shatah, and the author, in order to understand
global existence for nonlinear dispersive equations, set in the whole space,
and with small data. The idea is to combine the classical concept of
resonances, with the fea... | 1102.1695v1 |
2011-03-22 | Resonant Photoelectron Diffraction with circularly polarized light | Resonant angle scanned x-ray photoelectron diffraction (RXPD) allows the
determination of the atomic and magnetic structure of surfaces and interfaces.
For the case of magnetized nickel the resonant L2 excitation with circularly
polarized light yields electrons with a dichroic signature from which the
dipolar part may ... | 1103.4280v1 |
2011-06-09 | Wave approach for the resonances of rectangular and triangular membranes | This study develops a ray technique for determining the resonance frequencies
of triangular membranes. The technique is demonstrated for homogenous
rectangular and triangular membranes with fixed boundaries. Where possible, the
results are compared with exact calculations. The membrane resonances are
calculated using a... | 1106.1829v1 |
2011-07-29 | Sub-kHz-level relative stabilization of an intracavity doubled continuous wave optical parametric oscillator using Pound-Drever-Hall scheme | We report the relative frequency stabilization of an intracavity frequency
doubled singly resonant optical parametric oscillator on a Fabry-Perot\'etalon.
The red/orange radiation produced by the frequency doubling of the intracavity
resonant idler is stabilized using the Pound-Drever-Hall locking technique. The
relati... | 1107.5906v1 |
2011-07-30 | Electromagnetic response of a metamaterial with field-gradient-induced transparency | We investigate a dynamically controllable electromagnetically induced
transparency-like metamaterial. The unit structure of the metamaterial consists
of a low-quality-factor resonator and a high-quality-factor resonator. The
field gradient of the incident electromagnetic wave in the transverse direction
induces couplin... | 1108.0054v1 |
2011-11-05 | Optical antennas as nanoscale resonators | Recent progress in nanotechnology has enabled us to fabricate subwavelength
architectures that function as antennas for improving the exchange of optical
energy with nanoscale matter. We describe the main features of optical antennas
for enhancing quantum emitters and review designs that increase the spontaneous
emissi... | 1111.1302v1 |
2012-07-04 | Coupled $\ell$-wave confinement-induced resonances in cylindrically symmetric waveguides | A semi-analytical approach to atomic waveguide scattering for harmonic
confinement is developed taking into account all partial waves. As a
consequence $\ell$-wave confinement-induced resonances are formed being coupled
to each other due to the confinement. The corresponding resonance condition is
obtained analytically... | 1207.0989v3 |
2012-10-01 | Three-particle decays of light nuclei resonances | We have studied the three-particle decay of 12C, 9Be and 6Be resonances.
These nuclei have been described as three-body systems by means of the complex
scaled hyperspherical adiabatic expansion method. The short-distance part of
the wave-function is responsible for the energies whereas the information
related to the ob... | 1210.0319v1 |
2012-12-07 | Complex masses of resonances and the Cornell potential | Physical properties of the Cornell potential in the complex-mass scheme are
investigated. Two exact asymptotic solutions of relativistic wave equation for
the coulombic and linear components of the potential are used to derive the
resonance complex-mass formula. The centered masses and total widths of the
$\rho$-family... | 1212.1737v2 |
2012-12-21 | PT-symmetry with a system of three-level atoms | We show that a vapor of multilevel atoms driven by far-off resonant laser
beams, with possibility of interference of two Raman resonances, is highly
efficient for creating parity-time (PT) symmetric profiles of the probe-field
refractive index, whose real part is symmetric and imaginary part is
anti-symmetric in space.... | 1212.5486v1 |
2013-03-15 | A silicon electromechanical photodetector | Opto-mechanical systems have enabled wide-band optical frequency conversion
and multi-channel all-optical radio frequency amplification. Realization of an
on-chip silicon communication platform is limited by photodetectors needed to
convert optical information to electrical signals for further signal
processing. In thi... | 1303.3900v1 |
2013-04-03 | Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides | We demonstrate the generation of quantum-correlated photon pairs from a Si
photonic-crystal coupled-resonator optical waveguide. A slow-light supermode
realized by the collective resonance of high-Q and small-mode-volume
photonic-crystal cavities successfully enhanced the efficiency of the
spontaneous four-wave mixing ... | 1304.0843v1 |
2013-08-10 | Parametric patterns in optical fiber ring nonlinear resonators | We propose that parametrically excited patterns, also known as Faraday
patterns, can be observed in nonlinear fiber resonators, where the coefficient
of Kerr nonlinearity is periodically varying along the fiber in resonator. We
study the parametric instability analytically on the basis of the Floquet
theory, also numer... | 1308.2279v1 |
2013-12-17 | Similariton-like Pulses in Synchronously Pumped Singly Resonant Optical Parametric Oscillators | Similariton-like pulses are found to be formed in synchronously pumped singly
resonant optical parametric oscillators (OPO) by numerical simulation. The
nonlinear coupled-wave equations can be reduced to inhomogeneous nonlinear
Schr\"{o}dinger equation. The signal pulses with parabola-like temporal
intensity profile an... | 1312.4651v2 |
2014-01-24 | Restriction Bounds for the Free Resolvent and Resonances in Lossy Scattering | We establish high energy $L^2$ estimates for the restriction of the free
Green's function to hypersurfaces in $\mathbb{R}^d$. As an application, we
estimate the size of a logarithmic resonance free region for scattering by
potentials of the form $V\otimes \delta_{\Gamma}$, where $\Gamma \subset
\mathbb{R}^d$ is a finit... | 1401.6243v1 |
2014-03-20 | Waveguide Model for Thick Complementary Split Ring Resonators | This paper presents a very simple analytical model for the design of
Frequency Selective Surfaces based on Complementary Split Ring Resonators
(CSRR) within the microwave range. Simple expressions are provided for the most
important geometrical parameters of the model, yielding an accurate description
of the CSRR reson... | 1403.5139v1 |
2014-04-13 | Invariant sets and connecting orbits for nonlinear evolution equations at resonance | We study the problem of existence of orbits connecting stationary points for
the nonlinear heat and strongly damped wave equations being at resonance at
infinity. The main difficulty lies in the fact that the problems may have no
solutions for general nonlinearity. To address this question we introduce
geometrical assu... | 1404.3428v2 |
2014-07-16 | Selective engineering of cavity resonance for frequency matching in optical parametric processes | We propose to selectively engineer a single cavity resonance to achieve
frequency matching for optical parametric processes in high-Q microresonators.
For this purpose, we demonstrate an approach, selective mode splitting (SMS),
to precisely shift a targeted cavity resonance, while leaving other cavity
modes intact. We... | 1407.4488v1 |
2014-11-17 | Nonstationary photonic jet from dielectric microsphere | A photonic jet commonly denotes the specific spatially localized region in
the near-field forward scattering of a light wave at a dielectric micron-sized
particle. We present the detailed calculations of the transient response of an
airborne silica microsphere illuminated by a femtosecond laser pulse. The
spatial area ... | 1411.4870v1 |
2015-04-30 | Synthetic gauge fields for light beams in optical resonators | A method to realize artificial magnetic fields for light waves trapped in
passive optical cavities with anamorphic optical elements is theoretically
proposed. In particular, when a homogeneous magnetic field is realized, a
highly-degenerate Landau level structure for the frequency spectrum of the
transverse resonator m... | 1504.08162v1 |
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