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Condensed Matter papers — page 57

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Effective field theory description of the higher dimensional quantum Hall liquid
We derive an effective topological field theory model of the four dimensional quantum Hall liquid state recently constructed by Zhang and Hu. Using a generalization of the flux attachment…
B. Andrei Bernevig, Chyh-Hong Chern, Jiang-Ping Hu et al.Jun 11, 2002
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Wave function recombination instability in cold atom interferometers
Cold atom interferometers use guiding potentials that split the wave function of the Bose-Einstein condensate and then recombine it. We present theoretical analysis of the wave function recombination…
James A. Stickney, Alex A. ZozulyaJun 11, 2002
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On the Convergence of the Linear Delta Expansion for the Shift in Tc for Bose-Einstein Condensation
The leading correction from interactions to the transition temperature Tc for Bose-Einstein condensation can be obtained from a nonperturbative calculation in the critical O(N) scalar field theory…
Eric Braaten, Eugeniu RadescuJun 11, 2002
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Bright soliton trains of trapped Bose-Einstein condensates
We variationally determine the dynamics of bright soliton trains composed of harmonically trapped Bose-Einstein condensates with attractive interatomic interactions. In particular, we obtain the…
U. Al Khawaja, H. T. C. Stoof, R. G. Hulet et al.Jun 11, 2002
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The Cauchy Relations in Linear Elasticity Theory
In linear elasticity, we decompose the elasticity tensor into two irreducible pieces with 15 and 6 independent components, respectively. The vanishing of the piece with 6 independent components…
Friedrich W. Hehl, Yakov ItinJun 11, 2002
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Pair distribution function of the spin-polarized electron gas: A first-principles analytic model for all uniform densities
We construct analytic formulas that represent the coupling-constant-averaged pair distribution function (rs,ζ, kFu) of a uniform electron gas with density parameter rs =(9π/4)1/3/kF…
Paola Gori-Giorgi, John P. PerdewJun 10, 2002
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Stochastic Instability of Quasi-Isolated Systems
The stability of solutions to evolution equations with respect to small stochastic perturbations is considered. The stability of a stochastic dynamical system is characterized by the local stability…
V. I. YukalovJun 10, 2002
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Recurrence on the average on trees
In this paper we show that all infinite trees which have bounded coordination and whose surface is negligible with respect to the volume in the limit of large distances (so that they can be embedded…
L. DonettiJun 10, 2002
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Interplay of quantum magnetic and potential scattering around Zn or Ni impurity ions in superconducting cuprates
To describe the scattering of superconducting quasiparticles from non-magnetic (Zn) or magnetic (Ni) impurities in optimally doped high Tc cuprates, we propose an effective Anderson model…
Guang-Ming Zhang, Hui Hu, Lu YuJun 9, 2002
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What do we learn from the local geometry of glass-forming liquids?
We examine the local geometry of a simulated glass-forming polymer melt. Using the Voronoi construction, we find that the distributions of Voronoi volume P(vV) and asphericity P(a) appear to be…
Francis W. Starr, Srikanth Sastry, Jack F. Douglas et al.Jun 8, 2002
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Some Basic Aspects of Fractional Quantum Numbers
I review why and how physical states with fractional quantum numbers can occur, emphasizing basic mechanisms in simple contexts. The general mechanism of charge fractionalization is the passage from…
Frank WilczekJun 7, 2002
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Comment on "Spin Dynamics of the 2D Spin 1/2 Quantum Antiferromagnet Copper Deuteroformate Tetradeuterate (CFTD)"
Comment on "Spin Dynamics of the 2D Spin 1/2 Quantum Antiferromagnet Copper Deuteroformate Tetradeuterate (CFTD)", H. M. Ronnow et al., Phys. Rev. Lett. 87, 037202 (2001)
Peter Kopietz, Ivan SpremoJun 7, 2002
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Crossover exponent in O(N) phi4 theory at O(1/N2)
The critical exponent phic, derived from the anomalous dimension of the bilinear operator responsible for crossover behaviour in O(N) phi4 theory, is calculated at O(1/N2) in a large N expansion…
J. A. GraceyJun 7, 2002
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"Fermionization" of Rotating Spin-1 Bose Clusters
We propose a simple scheme of generating rotating atomic clusters in an optical lattices which produces states with quantum Hall and spin liquid properties. As the rotation frequencies increases, the…
Tin-Lun Ho, Erich J MuellerJun 7, 2002
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Generic differential equation for fractional flow of steady two-phase flow in porous media
We report on generic relations between fractional flow and pressure in steady two-phase flow in porous media. The main result is a differential equation for fractional flow as a function of phase…
Henning Arendt Knudsen, Alex HansenJun 6, 2002
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Spin transport in inhomogeneous magnetic fields: a proposal for Stern-Gerlach-like experiments with conduction electrons
Spin dynamics in spatially inhomogeneous magnetic fields is studied within the framework of Boltzmann theory. Stern-Gerlach-like separation of spin up and spin down electrons occurs in ballistic and…
Jaroslav Fabian, S. Das SarmaJun 6, 2002
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Temporal oscillations and phase transitions in the evolutionary minority game
The study of societies of adaptive agents seeking minority status is an active area of research. Recently, it has been demonstrated that such systems display an intriguing phase-transition: agents…
Ehud Nakar, Shahar HodJun 5, 2002
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Quantum phase transitions in alternating transverse Ising chains: Rigorous analytical and exact numerical results
We examine the ground state properties of the s=1/2 transverse Ising chain with regularly alternating bonds and fields using exact analytical results and exact numerical data for long (up to N=900)…
Oleg Derzhko, Johannes Richter, Taras Krokhmalskii et al.Jun 5, 2002
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A Mean Field Theory approach to a model with Dipole-Quadrupole interaction
We study a model initially proposed to describe a mixture of (CO) and (N2) adsorbed on exfoliated graphite. The approach used here is that of mean field theory. The Mean Field equations and the…
R. P. B. SantosJun 5, 2002
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Strong Coupling Limit of the Kardar-Parisi-Zhang Equation in 2+1 Dimensions
A master equation for the Kardar-Parisi-Zhang (KPZ) equation in 2+1 dimensions is developed. In the fully nonlinear regime we derive the finite time scale of the singularity formation in terms of the…
F. Shahbazi, A. A. Masoudi, M. Reza Rahimi TabarJun 3, 2002
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Collective ferromagnetism in two-component Fermi-degenerate gas trapped in finite potential
Spin asymmetry of the ground states is studied for the trapped spin-degenerate (two-component) gases of the fermionic atoms with the repulsive interaction between different components, and, for large…
T. Sogo, H. YabuMay 30, 2002
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The Architecture of Complex Systems
A short review of the recent results and models of complex networks.
Vito Latora, Massimo MarchioriMay 30, 2002
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Self-induced and induced transparencies of two-dimensional and three- dimensional superlattices
The phenomenon of transparency in two-dimensional and three-dimensional superlattices is analyzed on the basis of the Boltzmann equation with a collision term encompassing three distinct scattering…
Yuriy A. Romanov, Julia Yu. Romanova, Lev G. Mourokh et al.May 30, 2002
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Spatial distribution of photoelectrons participating in formation of x-ray absorption spectra
Interpretation of x-ray absorption near-edge structure (XANES) experiments is often done via analyzing the role of particular atoms in the formation of specific peaks in the calculated spectrum.…
Ondrej SiprMay 30, 2002
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Dynamics of a matter-wave bright soliton in an expulsive potential
The stability regimes and nonlinear dynamics of bright solitons created in a harmonic potential which is transversely attractive and longitudinally expulsive are presented. This choice of potential…
L. D. Carr, Y. CastinMay 29, 2002
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