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dzyaloshinskii - moriya interaction ( dmi ) in magnetic objects is of enormous interest, because it generates a built - in chirality of magnetic domain walls ( dws ) and topologically - protected skyrmions for efficient motion driven by spin - orbit torques. because of its importance for perspective applications and ac... | arxiv:1608.03678 |
in this work we define a stochastic adding machine associated to the fibonacci base and to a probabilities sequence $ \ overline { p } = ( p _ i ) _ { i \ geq 1 } $. we obtain a markov chain whose states are the set of nonnegative integers. we study probabilistic properties of this chain, such as transience and recurre... | arxiv:1508.05062 |
as medical hardware, plastics, tubes for gas - pipelines, hoses for floor - heating, shrink - foils for food packaging, automobile parts, wires and cables ( isolation ), tires, and even gemstones. compared to the amount of food irradiated, the volume of those every - day applications is huge but not noticed by the cons... | https://en.wikipedia.org/wiki/Nuclear_technology |
mobile radar networks, such as autonomous driving systems, are subject to the severe challenge of mutual interference. despite the inborn interference - proof capability in frequency modulation continuous waveform ( fmcw ) radar, interference management is necessary for dense radar networks. the approaches combatting t... | arxiv:2011.08803 |
we investigated the local electronic density of states in superconductor - normal metal ( nb - au ) bilayers using a very low temperature ( 60 mk ) stm. high resolution tunneling spectra measured on the normal metal ( au ) surface show a clear proximity effect with an energy gap of reduced amplitude compared to the bul... | arxiv:cond-mat/0312126 |
in this paper we carry out a low - temperature scan of the phase diagram of dense two - color qcd with $ n _ f = 2 $ quarks. the study is conducted using lattice simulation with rooted staggered quarks. at small chemical potential we observe the hadronic phase, where the theory is in a confining state, chiral symmetry ... | arxiv:1605.04090 |
we study the dynamics of entanglement in continuous variable quantum systems ( cvqs ). specifically, we study the phenomena of entanglement sudden death ( esd ) in general two - mode - n - photon states undergoing pure dephasing. we show that for these states, esd never occurs. these states are generalizations of the s... | arxiv:0810.0550 |
this paper presents a new large - scale dataset for recognition and temporal localization of human actions collected from web videos. we refer to it as hacs ( human action clips and segments ). we leverage both consensus and disagreement among visual classifiers to automatically mine candidate short clips from unlabele... | arxiv:1712.09374 |
bosonic cat qubits stabilized with a driven two - photon dissipation are systems with exponentially biased noise, opening the door to low - overhead, fault - tolerant and universal quantum computing. however, current gate proposals for such qubits induce substantial noise of the unprotected type, whose poor scaling wit... | arxiv:2303.00760 |
this paper introduces type p web supercategories. they are defined as diagrammatic monoidal $ k $ - linear supercategories via generators and relations. we study the structure of these categories and provide diagrammatic bases for their morphism spaces. we also prove these supercategories provide combinatorial models f... | arxiv:2109.03410 |
we obtain relations among boundary states in bosonic minimal open string theory using the boundary ground ring. we also obtain a difference equation that boundary correlators must satisfy. | arxiv:hep-th/0509142 |
a p. c. f. fractal with a regular harmonic structure admits an associated dirichlet form, which is itself associated with a laplacian. this laplacian enables us to give an analogue of the damped stochastic wave equation on the fractal. we show that a unique function - valued solution exists, which has an explicit formu... | arxiv:1611.04874 |
photoassociation, assembling molecules from atoms using laser light, is limited by the low density of atom pairs at sufficiently short interatomic separations. here, we show that non - resonant light with intensities of the order of 10 ^ 10 w / cm ^ 2 modifies the thermal cloud of atoms, enhancing the boltzmann weight ... | arxiv:1301.1143 |
we argue that the concepts of " freedom of choice " and of " causal order " are intrinsically linked : a choice is considered " free " if it is correlated only to variables in its causal future. we discuss the implications of this to bell - type scenarios, where two separate measurements are carried out, neither of whi... | arxiv:1302.4446 |
we introduce a relative refined $ \ chi _ y $ - genus for sch \ " on subvarieties of algebraic tori. these are rational functions of degree minus the codimension with coefficients in the ring of lattice polytopes. we prove that the relative refined $ \ chi _ y $ turns sufficiently generic intersections into products, a... | arxiv:1705.05719 |
in 2006 t. brown asked the following question : given a non - periodic infinite word $ x = x _ 1x _ 2x _ 3 \ cdots $ with values in a non - empty set $ \ mathbb { a }, $ does there exist a finite coloring $ \ varphi : \ mathbb { a } ^ + \ rightarrow c $ relative to which $ x $ does not admit a $ \ varphi $ - monochroma... | arxiv:1608.03519 |
a novel text data dimension reduction technique, called the tree - structured multi - linear principal component anal - ysis ( tmpca ), is proposed in this work. being different from traditional text dimension reduction methods that deal with the word - level representation, the tmpca technique reduces the dimension of... | arxiv:1801.06607 |
in order to test the unification scheme for double - lobed radio sources, the far - infrared properties of matched samples of radio - galaxies and radio - loud quasars were studied using isophot. the quasar data were complemented with nearly simultaneous submillimeter and centimeter radio data. the results show that qu... | arxiv:astro-ph/9902143 |
in this paper, we proposed a novel otss - assisted optical network architecture for smart - grid communication networks, which has unique requirements for low - latency connections. illustrative results show that, otss can provide extremely better performance in latency and blocking probability than conventional flexi ... | arxiv:1709.01350 |
we recall the notion of abstract bornology, and connect it with topological spaces and size functions. as a generalization of measures of non - compactness, we show how every size function can be mapped to a maxitive measure. | arxiv:2206.01533 |
the main task of an introductory laboratory course is to foster students ' manual, conceptual and statistical ability to investigate physical phenomena. needing very simple apparatus, pendulum experiments are an ideal starting point in our first - year laboratory course because they are rich in both physical content an... | arxiv:0901.0994 |
stand - alone direct current ( dc ) microgrids may belong to different owners and adopt various control strategies. this brings great challenge to its optimal operation due to the difficulty of implementing a unified control. this paper addresses the distributed optimal control of dc microgrids, which intends to break ... | arxiv:1706.02695 |
improving the accuracy and robustness of deep neural nets ( dnns ) and adapting them to small training data are primary tasks in deep learning research. in this paper, we replace the output activation function of dnns, typically the data - agnostic softmax function, with a graph laplacian - based high dimensional inter... | arxiv:1907.06800 |
in this paper, we consider the existence and multiplicity of prescribed mass solutions to the following nonlinear schrodinger equations with mixed nonlinearities. the standard approach based on the pohozaev identity to obtain normalized solutions is invalid as the presence of potential. besides, our study can be regard... | arxiv:2412.03296 |
covert communications hide the transmission of a message from a watchful adversary while ensuring a certain decoding performance at the receiver. in this work, a wireless communication system under fading channels is considered where covertness is achieved by using a full - duplex ( fd ) receiver. more precisely, the r... | arxiv:1810.06741 |
unsupervised graph representation learning has emerged as a powerful tool to address real - world problems and achieves huge success in the graph learning domain. graph contrastive learning is one of the unsupervised graph representation learning methods, which recently attracts attention from researchers and has achie... | arxiv:2201.07409 |
we reproduce the dis measurements of the proton structure function at high energy from the dipole model in momentum space. to model the dipole - proton forward scattering amplitude, we use the knowledge of asymptotic solutions of the balitsky - kovchegov equation, describing high - energy qcd in the presence of saturat... | arxiv:hep-ph/0612091 |
we prove the invariance of the contact angle in liquid - solid wetting phenomena : an electrified droplet is spreading on a solid surface. the drop is minimizing its energy. we express the differential of this energy with respect to the shape of the drop and deduce necessary conditions for optimality. by variational me... | arxiv:0707.2669 |
dimensionality reduction is a popular approach to tackle high - dimensional data with low - dimensional nature. subspace restricted isometry property, a newly - proposed concept, has proved to be a useful tool in analyzing the effect of dimensionality reduction algorithms on subspaces. in this paper, we provide a chara... | arxiv:1905.09608 |
paper is withdrawn due to errors ( superseded by math. ag / 0604303 ). formula 6. 5 is false. section 6 is false, and the main statement is true only for bundles $ b $ with $ c _ 1 ( b ) $ su ( 2 ) - invariant. | arxiv:math/0204240 |
in this paper we consider type i string theory compactified on a z _ 7 orbifold. the model has n = 1 supersymmetry, a u ( 4 ) \ otimes u ( 4 ) \ otimes u ( 4 ) \ otimes so ( 8 ) gauge group, and chiral matter. there are only d9 - branes ( for which we discuss tadpole cancellation conditions ) in this model correspondin... | arxiv:hep-th/9705163 |
deep learning has enabled breakthroughs in automated diagnosis from medical imaging, with many successful applications in ophthalmology. however, standard medical image classification approaches only assess disease presence at the time of acquisition, neglecting the common clinical setting of longitudinal imaging. for ... | arxiv:2405.08780 |
sign language is the dominant form of communication language used in the deaf and hearing - impaired community. to make an easy and mutual communication between the hearing - impaired and the hearing communities, building a robust system capable of translating the spoken language into sign language and vice versa is fu... | arxiv:2201.01609 |
the next generation of high energy e + e - linear colliders is expected to operate at \ sqrt { s } \ gtsim 500 gev. in this energy range the ww fusion channel dominates the higgs boson production cross section e + e - - > \ bar \ nu \ nu h ^ 0 / h ^ 0. we calculate the one - loop corrections to this process due to ferm... | arxiv:hep-ph/0210038 |
faraday rotation is one of the most widely used observables to infer the strength and configuration of the magnetic field in the ionised gas of the milky way and nearby spiral galaxies. here we compute synthetic faraday rotation maps at $ z = 0 $ for a set of disk galaxies from the auriga high - resolution cosmological... | arxiv:1807.02113 |
people are remarkably capable of generating their own goals, beginning with child ' s play and continuing into adulthood. despite considerable empirical and computational work on goals and goal - oriented behavior, models are still far from capturing the richness of everyday human goals. here, we bridge this gap by col... | arxiv:2405.13242 |
we study the statistical mechanics of grafted polymers of arbitrary stiffness in a two - dimensional embedding space with monte carlo simulations. the probability distribution function of the free end is found to be highly anisotropic and non - gaussian for typical semiflexible polymers. the reduced distribution in the... | arxiv:physics/0311012 |
large datasets that were made publicly available to the research community over the last 20 years have been a key enabling factor for the advances in deep learning algorithms for nlp or computer vision. these datasets are generally pairs of aligned image / manually annotated metadata, where images are photographs of ev... | arxiv:2211.01226 |
the branching rule for spin irreducible representations of symmetric groups gives rise to a markov chain on the spin dual $ ( \ widetilde { \ mathfrak { s } } _ n ) ^ \ wedge _ { \ mathrm { spin } } $ of symmetric group $ \ mathfrak { s } _ n $ through restriction and induction of spin irreducible representations. this... | arxiv:2309.06059 |
the distance - decay function of the geographical gravity model is originally an inverse power law, which suggests a scaling process in spatial interaction. however, the distance exponent of the model cannot be explained with the ideas from euclidean geometry. this results in what is called dimension dilemma. in partic... | arxiv:1503.02915 |
thermal boundary conductance at a metal - dieletric interface is a quantity of prime importance for heat management at the nanoscale. while the boundary conductance is usually ascribed to the coupling between metal phonons and dielectric phonons, in this work we examine the influence of a direct coupling between the me... | arxiv:1501.03176 |
the tunneling splitting of the energy levels of a ferromagnetic particle in the presence of an applied magnetic field - previously derived only for the ground state with the path integral method - is obtained in a simple way from schroedinger theory. the origin of the factors entering the result is clearly understood, ... | arxiv:cond-mat/9711119 |
in this work we investigate the finite - size effects on the phase structure of walecka model within the framework of generalized zeta - function, focusing on the influence of temperature as well as the number and length of compactified spatial dimensions. here we concentrate on the situation of larger values of the co... | arxiv:1711.07934 |
smartphone location - based methods have been proposed and implemented as an effective alternative to traditional labor intensive contact tracing methods. however, there are serious privacy and security concerns that may impede wide - spread adoption in many societies. furthermore, these methods rely solely on proximit... | arxiv:2006.08568 |
a bio - colloidal drying droplet can be used as a pre - diagnostic technique. however, a successful clinical setting requires a fundamental understanding of the final morphology and the way it is related to the initial state of the constituents present in the droplet. this chapter focuses on the physics associated with... | arxiv:2105.05922 |
the particle - in - cell ( pic ) method is widely used in relativistic particle beam and laser plasma modeling. however, the pic method exhibits numerical instabilities that can render unphysical simulation results or even destroy the simulation. for electromagnetic relativistic beam and plasma modeling, the most relev... | arxiv:1407.5253 |
we study the existence, the stability and the non - degeneracy of normalized standing - waves solutions to a one dimensional non - linear schr \ " odinger equation. the non - linearity belongs to a class of algebraic functions appropriately defined. we can show that for some of these non - linearities one can observe t... | arxiv:2308.02932 |
the study of planktonic ecosystems is important as they make up the bottom trophic levels of aquatic food webs. we study a closed nutrient - phytoplankton - zooplankton ( npz ) model that includes size structure in the juvenile zooplankton. the closed nature of the system allows the formulation of a conservation law of... | arxiv:1505.07174 |
we generalise the $ \ alpha $ - ramsey cardinals introduced in holy and schlicht ( 2018 ) for cardinals $ \ alpha $ to arbitrary ordinals $ \ alpha $, and answer several questions posed in that paper. in particular, we show that $ \ alpha $ - ramseys are downwards absolute to the core model $ k $ for all $ \ alpha $ of... | arxiv:1804.10383 |
the hyperinvariant subspace problem is solved in the setting of hilbert and right hamilton space, motivated by my earlier works in the invariant subspace problem. | arxiv:2306.13940 |
we report preliminary results of the characterization of bulge and inner disk stellar populations for 8 nearby spiral galaxies using gemini / gmos. the long - slit spectra extend out to 1 - 2 disk scale lengths with s / n / ang > 50. two different model fitting techniques, absorption - line indices and full spectral sy... | arxiv:astro-ph/0701881 |
we propose that the periodic fast radio bursts of frb 180916. j0158 + 65 are sourced by axion emission ( mass $ m _ { a } \ sim 10 ^ { - 14 } $ ev ) from cosmic superstrings. some of the emitted axions are converted to photons by magnetic fields as they travel along the line of sight to earth. an impulsive burst of axi... | arxiv:2003.07275 |
the traditional realm of astronomy is the observation and study of the largest objects in the universe, while the traditional domain of high - energy physics is the study of the smallest things in nature. but these two sciences concerned with opposite ends of the size spectrum are, in muir ' s words, bound fast by a th... | arxiv:0708.1199 |
the number of partitions of $ n $ wherein odd parts are distinct and even parts are unrestricted, often denoted by $ pod ( n ) $. in this paper, we provide linear recurrence relations for $ pod ( n ) $, and the connections of $ pod ( n ) $ with other partition functions. | arxiv:2401.09374 |
we use equivariant methods to establish basic properties of orbifold k - theory. we introduce the notion of twisted orbifold k - theory in the presence of discrete torsion, and show how it can be explicitly computed for global quotients. | arxiv:math/0107168 |
we provide characterizations of lie groups as compact - like groups in which all closed zero - dimensional metric ( compact ) subgroups are discrete. the " compact - like " properties we consider include ( local ) compactness, ( local ) omega - boundedness, ( local ) countable compactness, ( local ) precompactness, ( l... | arxiv:1705.03425 |
in this paper we will demonstrate that any compact quantum group can be used as symmetry groups for quantum channels, which leads us to the concept of covariant channels. we, then, unearth the structure of the convex set of covariant channels by identifying all extreme points under the assumption of multiplicity - free... | arxiv:2007.03901 |
magnetically arrested accretion discs ( mads ), where the magnetic pressure in the inner disc is dynamically important, provide an alternative mechanism for regulating accretion to what is commonly assumed in black hole systems. we show that a global magnetic field inversion in the mad state can destroy the jet, signif... | arxiv:1312.1691 |
high quality epitaxial thin films of labimn4 / 3co2 / 3o6 perovskite were fabricated on ( 001 ) - oriented srtio3 and laalo3 substrates by the pulsed laser deposition technique. magnetization measurements reveal a strong magnetic anisotropy and a ferromagnetic behavior that is in agreement with a super - exchange inter... | arxiv:0801.3321 |
the key step in classical convolution and correlation algorithms, the componentwise multiplication of vectors after initial fourier transforms, is shown to be physically impossible to do on quantum states. then this is used to show that computing the convolution or correlation of quantum state coefficients violates qua... | arxiv:quant-ph/0309070 |
with the rapid advancement of large language models ( llms ), aligning policy models with human preferences has become increasingly critical. direct preference optimization ( dpo ) has emerged as a promising approach for alignment, acting as an rl - free alternative to reinforcement learning from human feedback ( rlhf ... | arxiv:2410.15595 |
we introduce a generalized method of holonomic quantum computation ( hqc ) based on encoding in subsystems. as an application, we propose a scheme for applying holonomic gates to unencoded qubits by the use of a noisy ancillary qubit. this scheme does not require initialization in a subspace since all dynamical effects... | arxiv:0905.1249 |
we study the fault - tolerance of networks from both the structural and computational point of view using the minimum leaf number of the corresponding graph $ g $, i. e. the minimum number of leaves of the spanning trees of $ g $, and its vertex - deleted subgraphs. we investigate networks that are leaf - guaranteed, i... | arxiv:2502.10213 |
two people meet in a coffeehouse and decide to share one dessert from a menu of several possible choices. how should they choose which one? a method is presented that is intended to be practical, avoiding the need for long negotiations or complete menu rankings, while offering a high likelihood of satisfaction and fair... | arxiv:2308.16324 |
the purpose of this paper is to give a short microlocal proof of the meromorphic continuation of the ruelle zeta function for c ^ \ infty anosov flows. more general results have been recently proved by giulietti - liverani - pollicott [ arxiv : 1203. 0904 ] but our approach is different and is based on the study of the... | arxiv:1306.4203 |
bollob \ ' as proved that for every $ k $ and $ \ ell $ such that $ k \ mathbb { z } + \ ell $ contains an even number, an $ n $ - vertex graph containing no cycle of length $ \ ell \ bmod k $ can contain at most a linear number of edges. the precise ( or asymptotic ) value of the maximum number of edges in such a grap... | arxiv:2312.09999 |
in the context of low - viscosity protoplanetary discs ( ppds ), the formation scenarios of the solar system should be revisited. in particular, the jupiter - saturn pair has been shown to lock in the 2 : 1 mean motion resonance while migrating generally inwards, making the grand tack scenario impossible. we explore wh... | arxiv:2406.20075 |
we present the results of an extensive study of the phase diagram and spin wave excitations for a general spin model on a hexagonal ab - stacked kagome system. the boundaries of the magnetic phases are determined via a combination of numerical ( monte carlo ) and analytical ( luttinger - tisza ) methods. we also determ... | arxiv:2207.09297 |
machine learning ( ml ), especially deep neural networks ( dnns ) have been widely used in various applications, including several safety - critical ones ( e. g. autonomous driving ). as a result, recent research about adversarial examples has raised great concerns. such adversarial attacks can be achieved by adding a ... | arxiv:2005.14137 |
based on a mathematical lemma related to the vandermonde determinant and two theorems derived from the first law of black hole thermodynamics, we investigate the angular momentum independence of the entropy sum as well as the entropy product of general rotating kaluza - klein black holes in higher dimensions. we show t... | arxiv:1605.01587 |
turbulence facilitates collisions between particles suspended in a turbulent flow. two effects have been proposed which can enhance the collision rate at high turbulence intensities : ' preferential concentration ' ( a clustering phenomenon ) and the ' sling effect ' ( arising from the formation of caustic folds in the... | arxiv:1307.6853 |
quantum heat engines are expected to outperform the classical counterparts due to quantum coherences involved. here we experimentally execute a single - ion quantum heat engine and demonstrate, for the first time, the dynamics and the enhanced performance of the heat engine originating from the liouvillian exceptional ... | arxiv:2302.13450 |
in this note, we study the twisted jacquet modules of sub - quotients of principal series representations of $ { \ rm gl } _ 2 ( d ) $ where $ d $ is a division algebra over a non - archimedean local field $ f $. we begin with a proof of a conjecture due to d. prasad on twisted jacquet modules of speh representations o... | arxiv:2310.00735 |
prompting a pretrained language model with natural language patterns has been proved effective for natural language understanding ( nlu ). however, our preliminary study reveals that manual discrete prompts often lead to unstable performance - - e. g., changing a single word in the prompt might result in substantial pe... | arxiv:2103.10385 |
we study the bulk and shear elastic properties of barely - compressed, " athermal " emulsions and find that the rigidity of the jammed solid fails at remarkably large critical osmotic pressures. the minuscule yield strain and similarly small brownian particle displacement of solid emulsions close to this transition sug... | arxiv:2004.09594 |
we propose a model with a quantized degree of freedom to study the heat transport in quasi - one dimensional system. our simulations reveal three distinct temperature regimes. in particular, the intermediate regime is characterized by heat conductivity with a temperature exponent $ \ gamma $ much greater than 1 / 2 tha... | arxiv:cond-mat/0609733 |
it is now clear that the stars in the solar neighbourhood display large - scale coherent vertical breathing motions. at the same time, milky way - like galaxies experience tidal interactions with satellites / companions during their evolution. while these tidal interactions can excite vertical oscillations, it is still... | arxiv:2208.07096 |
we present the discovery of a single radio relic located at the edge of the galaxy cluster a2384, using the meerkat radio telescope. a2384 is a nearby ( $ z $ = 0. 092 ), low mass, complex bimodal, merging galaxy cluster that displays a dense x - ray filament ( $ \ sim $ 700 kpc in length ) between a2384 ( n ) ( northe... | arxiv:2009.02724 |
in this study, we utilize gaussian processes, probabilistic neural network, natural gradient boosting, and quantile regression augmented gradient boosting to model lead times of laser manufacturing processes. we introduce probabilistic modelling in the domain and compare the models in terms of different abilities. whil... | arxiv:2204.13792 |
soft interactions are not easily disentangled from hard ones. in an operational definition of soft and hard processes one finds that at presently analyzed scales there is an interplay of soft and hard processes. as the scale increases, so does the amount of hard processes. so far, nothing is as soft nor as hard as we w... | arxiv:hep-ex/9511006 |
we present a novel reconfigurable metal - oxide - semiconductor multi - gate transistor that can host a quadruple quantum dot in silicon. the device consist of an industrial quadruple - gate silicon nanowire field - effect transistor. exploiting the corner effect, we study the versatility of the structure in the single... | arxiv:1603.03636 |
in this letter, we give a characterization for a generic construction of bent functions. this characterization enables us to obtain another efficient construction of bent functions and to give a positive answer on a problem of bent functions. | arxiv:2301.04456 |
we present a scene representation, which we call a tactile - augmented radiance field ( tarf ), that brings vision and touch into a shared 3d space. this representation can be used to estimate the visual and tactile signals for a given 3d position within a scene. we capture a scene ' s tarf from a collection of photos ... | arxiv:2405.04534 |
we investigate the origin of stars in the innermost $ 500 \, \ mathrm { pc } $ of galaxies spanning stellar masses of $ 5 \ times10 ^ { 8 - 12 } \, \ mathrm { m } _ { \ odot } $ at $ \ mathrm { z = 0 } $ using the cosmological magnetohydrodynamical tng50 simulation. three different origins of stars comprise galactic ce... | arxiv:2301.11942 |
recently han and heary proposed an approach to steady - state quantum transport through mesoscopic structures, which maps the non - equilibrium problem onto a family of auxiliary quantum impurity systems subject to imaginary voltages. we employ continuous - time quantum monte - carlo solvers to calculate accurate imagi... | arxiv:1002.4081 |
in this paper, we study dynamics of geodesic flows over closed surfaces of genus greater than or equal to 2 without focal points. especially, we prove that there is a large class of potentials having unique equilibrium states, including scalar multiples of the geometric potential, provided the scalar is less than 1. mo... | arxiv:1808.00663 |
we construct spherically symmetric dyonic black holes in a generalized maxwell - friedberg - lee - sirlin type model with a complex scalar doublet and a symmetry breaking potential { for the real scalar field }, minimally coupled to einstein gravity in asymptotically flat space. we analyze the properties of the hairy b... | arxiv:2407.21463 |
two complementary mechanisms are thought to shape social groups : homophily between agents and structural balance in connected triads. here we consider $ n $ fully connected agents, where each agent has $ g $ underlying attributes, and the similarity between agents in attribute space ( i. e., homophily ) is used to det... | arxiv:2001.06573 |
we consider the hard leptoproduction of a photon off nuclei up to spin - 1. as a new result we present here the general azimuthal angular dependence of the differential cross section for a spin - 1 target. its twist - two fourier coefficients of the interference and squared deeply virtual compton scattering amplitude a... | arxiv:hep-ph/0302007 |
black holes generate collimated, relativistic jets which have been observed in gamma - ray bursts ( grbs ), microquasars, and at the center of some galaxies ( active galactic nuclei ; agn ). how jet physics scales from stellar black holes in grbs to the supermassive ones in agns is still unknown. here we show that jets... | arxiv:1212.3343 |
we study the problem of finding a hamiltonian cycle under the promise that the input graph has a minimum degree of at least $ n / 2 $, where $ n $ denotes the number of vertices in the graph. the classical theorem of dirac states that such graphs ( a. k. a. dirac graphs ) are hamiltonian, i. e., contain a hamiltonian c... | arxiv:2302.00742 |
we prove that all 2 - bridge ribbon knots are symmetric unions. | arxiv:math/0602395 |
problem definition : supply chains are constantly evolving networks. reinforcement learning is increasingly proposed as a solution to provide optimal control of these networks. academic / practical : however, learning in continuously varying environments remains a challenge in the reinforcement learning literature. met... | arxiv:2312.15502 |
we present two classes of stars with yet unknown evolutionary phase : the b [ e ] supergiants and the so - called unclassified b [ e ] stars. while the b [ e ] supergiants are luminous post - main sequence stars with high mass progenitors, not much is known of the unclassified stars. we discuss how it might be possible... | arxiv:astro-ph/0410482 |
we investigate spin precession in the presence of randomly distributed field sources. their fields h _ i reorient by thermally activated transitions and decrease as r ^ { - mu } with the distance from the spin probe. based on analytical calculations and scaling arguments we find that the polarization decay of a spin en... | arxiv:cond-mat/0110553 |
it is known that for $ c ^ { \ infty } $ determining sets markov ' s property is equivalent to bernstein ' s property. the purpose of this paper is to prove an analogous result in the case of compact subsets of algebraic varieties. | arxiv:1812.04273 |
i argue that the presence of magnetic fields around evolved stars, e. g., asymptotic giant branch stars, and in pne, does not necessarily imply that the magnetic field plays a global dynamical role in shaping the circumstellar envelope. instead, i favor magnetic fields with small coherence lengths, which result from st... | arxiv:astro-ph/0204157 |
the belief that three dimensional space is infinite and flat in the absence of matter is a canon of physics that has been in place since the time of newton. the assumption that space is flat at infinity has guided several modern physical theories. but what do we actually know to support this belief? a simple argument, ... | arxiv:1704.03334 |
kilonovae ( kne ) are one of the fastest types of optical transients known, cooling rapidly in the first few days following their neutron - star merger origin. we show here that kn spectral features go through rapid recombination transitions, with features due to elements in the new ionisation state emerging quickly. d... | arxiv:2312.02258 |
an algorithm for constructing parity - check matrices of non - binary quasi - cyclic low - density parity - check ( nb qc - ldpc ) codes is proposed. the algorithm finds short cycles in the base matrix and tries to eliminate them by selecting the circulants and the elements of gf ( q ). firstly the algorithm tries to e... | arxiv:1705.10717 |
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