Relaxation Processes in Clouds of Trapped Bosons above the Bose-Einstein Condensation TemperatureWe present a unified account of damping of low-lying collective modes and of relaxation of temperature anisotropies in a trapped Bose gas in the collisionless regime. By means of variational…G. M. Kavoulakis, C. J. Pethick, H. Smith·Apr 17, 1998SaveLearn
Creep via dynamical functional renormalization groupWe study a D-dimensional interface driven in a disordered medium. We derive finite temperature and velocity functional renormalization group (FRG) equations, valid in a 4-D expansion. These equations…P. Chauve, T. Giamarchi, P. Le Doussal·Apr 17, 1998SaveLearn
Specific heat of two-dimensional diluted magnetsUsing Monte Carlo techniques, the two-dimensional site-diluted Ising model is studied. In particular, properties of the specific heat, its critical behaviour and the emergence of a non-singular…W. Selke, L. N. Shchur, O. A. Vasilyev·Apr 17, 1998SaveLearn
Third-Generation TB-LMTOWe describe the screened Korringa-Kohn-Rostoker (KKR) method and the third-generation linear muffin-tin orbital (LMTO) method for solving the single-particle Schroedinger equation for a MT potential.…O. K. Andersen, C. Arcangeli, R. W. Tank et al.·Apr 16, 1998SaveLearn
Josephson Effects in Double-Layer Quantum Hall StatesUnder quite plausible assumptions on double-layer quantum Hall states with strong interlayer correlation, we show in general framwork that coherent tunneling of a single electron between two layers…Aiichi Iwazaki·Apr 16, 1998SaveLearn
Interaction and Quantum DecoherenceWe discuss a fundamental effect of the interaction-induced decoherence of the electron wave function in disordered metals. In the first part of the paper we consider a simple model of a quantum…D. S. Golubev, A. D. Zaikin·Apr 15, 1998SaveLearn
Shift Equivalence of Measures and the Intrinsic Structure of Shocks in the Asymmetric Simple Exclusion ProcessWe investigate properties of non-translation-invariant measures, describing particle systems on , which are asymptotic to different translation invariant measures on the left and on the right.…B. Derrida, S. Goldstein, J. L. Lebowitz et al.·Apr 15, 1998SaveLearn
Fixed-Node Monte Carlo Calculations for the 1d Kondo Lattice ModelThe effectiveness of the recently developed Fixed-Node Quantum Monte Carlo method for lattice fermions, developed by van Leeuwen and co-workers, is tested by applying it to the 1D Kondo lattice, an…H. J. M. van Bemmel, W. van Saarloos, D. F. B. ten Haaf·Apr 15, 1998SaveLearn
Folding and Aggregation of Designed ProteinsStudies of how protein fold have shown that the way protein clumps form in the test tube is similar to how proteins form the so-called ``amyloid'' deposits that are the pathological signal of…R. A. Broglia, G. Tiana, S. Pasquali et al.·Apr 14, 1998SaveLearn
The dynamics of component separation in a binary mixture of Bose-Einstein condensatesWe present studies of the time-evolution of a two-component system of Bose-Einstein condensates (BEC) in the |F=1, mf=-1> and |2,1> spin states of Rb-87. The two condensates are created with a…D. S. Hall, M. R. Matthews, J. R. Ensher et al.·Apr 14, 1998SaveLearn
Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable BosonsWe calculate, within the pseudopotential approximation, a one-dimensional scattering amplitude and effective one-dimensional interaction potential for atoms confined transversally by an atom…Maxim Olshanii·Apr 13, 1998SaveLearn
Microscopic theory of weak pseudogap behavior in the underdoped cuprate superconductors I: General theory and quasiparticle propertiesWe derive in detail a novel solution of the spin fermion model which is valid in the quasi-static limit pi T<<omegasf, found in the intermediate (pseudoscaling) regime of the magnetic phase diagram…Joerg Schmalian, David Pines, Branko Stojkovic·Apr 13, 1998SaveLearn
Arithmetic of the integer quantum Hall effecttext of abstract (Integer quantum Hall effect (IQHE) has been analysed considering the degeneracies of localized and extended states separately. Occupied localized and extended states are counted and…Vipin Srivastava·Apr 11, 1998SaveLearn
Scattering of Phonons by a Vortex in a SuperfluidRecent work gives a transverse force on an isolated moving vortex which is independent of the normal fluid velocity, but it is widely believed that the asymmetry of phonon scattering by a vortex…C. Wexler, D. J. Thouless·Apr 9, 1998SaveLearn
Boundary Critical Phenomena in the Three-State Potts ModelBoundary critical phenomena are studied in the 3- State Potts model in 2 dimensions using conformal field theory, duality and renormalization group methods. A presumably complete set of boundary…Ian Affleck, Masaki Oshikawa, Hubert Saleur·Apr 9, 1998SaveLearn
Energy landscape, two-level systems and entropy barriers in Lennard-Jones clustersWe develop an efficient numerical algorithm for the identification of a large number of saddle points of the potential energy function of Lennard- Jones clusters. Knowledge of the saddle points…G. Daldoss, O. Pilla, G. Viliani et al.·Apr 9, 1998SaveLearn
Temperature-Dependent Frequency Shifts in Collective Excitations of a Bose-Einstein CondensateBy including the contribution of the thermal cloud to the Lagrangian of the condensate of a Bose gas, we extend the time-dependent variational method at zero temperature to study…Hualin Shi, Wei-Mou Zheng·Apr 9, 1998SaveLearn
Polaron Problem by Diagrammatic Quantum Monte CarloWe present a precise solution of the polaron problem by a novel Monte Carlo method. Basing on conventional diagrammatic expansion for the Green function of the polaron, G( k, τ), we construct…Nikolai V. Prokof'ev, Boris V. Svistunov·Apr 8, 1998SaveLearn
Quantum Corrections for Generalized Partition FunctionsThe classical limit for generalized partition functions is obtained using coherent states. In this framework it is presented a general procedure to obtain all the corrections to the classical limit.…L. R. Evangelista, L. C. Malacarne, R. S. Mendes·Apr 8, 1998SaveLearn
Dynamics of the Peierls-active phonon modes in CuGeO3We reconsider the Cross and Fischer approach to spin-Peierls transitions. We show that a soft phonon occurs only if Omega0<2.2 TSP. For CuGeO3 this condition is not fulfilled and the calculated…Claudius Gros, Ralph Werner·Apr 8, 1998SaveLearn
Field and density coherence of matter-wave fieldsIn analogy to Glauber's analysis of optical coherence, we adopt an operational approach to introduce different classes of atomic coherence associated with different types of measurements. For the…E. V. Goldstein, O. Zobay, P. Meystre·Apr 7, 1998SaveLearn
Gravity of Monopole and String and Gravitational Constant in 3He-AWe discuss the effective metric produced in superfluid 3He-A by such topological objects as radial disgyration and monopole. In relativistic theories these metrics are similar to that of the local…G. E. Volovik·Apr 7, 1998SaveLearn
Folding Transitions of the Square-Diagonal LatticeWe address the problem of "phantom" folding of the tethered membrane modelled by the two-dimensional square lattice, with bonds on the edges and diagonals of each face. Introducing bending…P. Di Francesco·Apr 6, 1998SaveLearn
Complexity of Two-Dimensional PatternsIn dynamical systems such as cellular automata and iterated maps, it is often useful to look at a language or set of symbol sequences produced by the system. There are well-established classification…Kristian Lindgren, Cristopher Moore, Mats G. Nordahl·Apr 6, 1998SaveLearn
Reply to Comment on ``Two-dimensional charged-exciton complexes''We respond to criticisms raised by K. Varga (cond-mat/9802262) and reaffirm that the results in our original paper obtained using a two-body analytical method remains valid within the framework of an…A. Thilagam·Apr 6, 1998SaveLearn