Kinetic energy of a trapped Fermi gas interacting with a Bose-Einstein condensateWe study a confined mixture of bosons and fermions in the regime of quantal degeneracy, with particular attention to the effects of the interactions on the kinetic energy of the fermionic component.…L. Vichi, M. Amoruso, A. Minguzzi et al.·Sep 10, 1999SaveLearn
Preparing Topological States of a Bose-Einstein CondensateThe burgeoning field of Bose-Einstein condensation in dilute alkali and hydrogen gases has stimulated a great deal of research into the statistical physics of weakly interacting quantum degenerate…J. E. Williams, M. J. Holland·Sep 10, 1999SaveLearn
Thermodynamic identities and particle number fluctuations in weakly interacting Bose--Einstein condensatesWe derive exact thermodynamic identities relating the average number of condensed atoms and the root-mean-square fluctuations determined in different statistical ensembles for the weakly interacting…Fabrizio Illuminati, Patrick Navez, Martin Wilkens·Sep 10, 1999SaveLearn
Photoinduced IR absorption in (La(1-x)Sr(x)Mn)(1-δ)O3: changes of the anti-Jahn-Teller polaron binding energy with dopingPhotoinduced IR absorption was measured in (La(1-x)Sr(x)Mn)(1-δ)O3. A midinfrared peak centered at ~ 5000 cm-1 was observed in the x=0 antiferromagnetic sample. The peak diminishes and softens…T. Mertelj, D. Kuscer, M. Kosec et al.·Sep 10, 1999SaveLearn
Temperature cycling during the aging of a polymer glassTemperature cycling is used to study of aging properties of PMMA dielectric constant. If a negative temperature cycle is applied during the aging time the relaxation dynamics is just delayed for a…L. Bellon, S. Ciliberto, C. Laroche·Sep 10, 1999SaveLearn
Entropy and dynamic properties of water below the homogeneous nucleation temperatureControversy exists regarding the possible existence of a transition between the liquid and glassy states of water. Here we use experimental measurements of the entropy, specific heat, and enthalpy of…Francis W. Starr, C. Austen Angell, Robin J. Speedy et al.·Sep 10, 1999SaveLearn
Mesoscopic fluctuations of the Coulomb dragWe consider mesoscopic fluctuations of the Coulomb drag coefficient ρD in the system of two separated two-dimensional electron gases. It is shown that at low temperatures sample to sample…B. N. Narozhny, I. L. Aleiner·Sep 9, 1999SaveLearn
Reduced Density Matrix Approach to Phononic Dissipation in FrictionUnderstanding mechanisms for energy dissipation from nanoparticles in contact with large samples is a central problem in describing friction microscopically. Calculation of the reduced density matrix…A. Ozpineci, D. M. Leitner, S. Ciraci·Sep 9, 1999SaveLearn
Symmetry, Geometry, Topology and Spin: Heisenberg spins in the continuum limit/magnetic vesiclesIn this thesis I present my research on the exotic configurations of antiferromagnetic systems characterised by a topological invariant. The research presented outlines the construction of novel…Jerome Benoit·Sep 8, 1999SaveLearn
Effective and Asymptotic Critical Exponents of Weakly Diluted Quenched Ising Model: 3d Approach Versus ε1/2-ExpansionWe present a field-theoretical treatment of the critical behavior of three-dimensional weakly diluted quenched Ising model. To this end we analyse in a replica limit n=0 5-loop renormalization group…R. Folk, Yu. Holovatch, T. Yavors'kii·Sep 8, 1999SaveLearn
Spin-fluctuation exchange study of superconductivity in two- and three-dimensional single-band Hubbard modelsIn order to identify the most favorable situation for superconductivity in the repulsive single-band Hubbard model, we have studied instabilities for d-wave pairing mediated by antiferromagnetic spin…Ryotaro Arita, Kazuhiko Kuroki, Hideo Aoki·Sep 8, 1999SaveLearn
Heisenberg Spins on a Cylinder SectionClassical Heisenberg spins in the continuum limit (i.e. the nonlinear sigma-model) are studied on an elastic cylinder section with homogeneous boundary conditions. The latter may serve as a physical…Jerome Benoit, Rossen Dandoloff, Avadh Saxena·Sep 7, 1999SaveLearn
Global and local level dynamics in chaotic microwave billiardsThe spectra of Sinai microwave billiards and rectangular billiards with statistically distributed circular scatterers have been taken as a function of the position of one wall, and of one of the…M. Barth, U. Kuhl, H. -J. Stoeckmann·Sep 7, 1999SaveLearn
Finite-Temperature Monte Carlo Calculations For Systems With FermionsWe present a quantum Monte Carlo method which allows calculations on many-fermion systems at finite temperatures without any sign decay. This enables simulations of the grand-canonical ensemble at…Shiwei Zhang·Sep 6, 1999SaveLearn
Constrained Path Monte Carlo For FermionsThis article contains lecture notes on the constrained path Monte Carlo method and its applications to study the Hubbard model. The lectures were given at the NATO Advanced Summer Institute held in…Shiwei Zhang·Sep 6, 1999SaveLearn
The monoclinic phase of PZT ceramics: Raman and phenomenological theory studiesThis work reports on the first Raman detection of the tetragonal to monoclinic phase transition in PZT ceramics near morphotropic phase boundary at low temperatures. The transition is characterized…A. G. Souza Filho, K. C. V. Lima, A. P. Ayala et al.·Sep 3, 1999SaveLearn
Systematic low temperature expansion in Ginzburg - Landau modelConsistent perturbation theory for thermodynamical quantities in strongly type II superconductors in magnetic field at low temperatures is developed. It is complementary to the existing expansion…H. C. Kao, B. Rosenstein, J. C. Lee·Sep 3, 1999SaveLearn
Renormalization-group theory for rotating 4He near the superfluid transitionThe influence of a uniform rotation with frequency Omega on the critical behavior of liquid 4He near Tlambda is investigated. We apply our recently developed approach which is a…Rudolf Haussmann·Sep 2, 1999SaveLearn
Quantization of the free charge carriers on InSb at room temperatureA new method of self-consistent quantum calculation of the density of the space charge near the surface of a crystal is carried out for the semiconductor with nonparabolic (Kane) dispersion law of…A. M. Yafyasov, I. M. Ivankiv, V. B. Bogevolnov·Aug 31, 1999SaveLearn
"Quantum phase transitions" in classical nonequilibrium processesDiffusion limited reaction of the Lotka-Volterra type is analyzed taking into account the discrete nature of the reactants. In the continuum approximation, the dynamics is dominated by an elliptic…Eldad Bettelheim, Oded Agam, Nadav M. Shnerb·Aug 30, 1999SaveLearn
Thermodynamics of the s=1/2 transverse XX chain with Dzyaloshinskii-Moriya interaction in the presence of correlated Lorentzian disorderThe spin-1/2 transverse XY chain with correlated disorder may exhibit the nonzero averaged transverse magnetization at zero averaged transverse field. We discuss this peculiarity connected with…O. Derzhko, J. Richter, V. Derzhko·Aug 28, 1999SaveLearn
On the problem of an electron scattering in an arbitrary one-dimensional potential fieldRecurrent representations for an electron transmission and reflection amplitudes for a one-dimensional chain are obtained. The linear differential equations for scattering amplitudes of an arbitrary…David M. Sedrakian, Ashot Zh. Khachatrian·Aug 28, 1999SaveLearn
Dynamics of simulated water under pressureWe present molecular dynamics simulations of the SPC/E model of water to probe the dynamic properties at temperatures from 350 K down to 190 K and pressures from 2.5GPa (25kbar) down to -300MPa…Francis W. Starr, Francesco Sciortino, H. Eugene Stanley·Aug 27, 1999SaveLearn
Instantaneous Normal Mode Analysis of Supercooled WaterWe use the instantaneous normal mode approach to provide a description of the local curvature of the potential energy surface of a model for water. We focus on the region of the phase diagram in…Emilia La Nave, Antonio Scala, Francis W. Starr et al.·Aug 27, 1999SaveLearn
Electronic Raman Scattering in Superconducting CupratesWe show that the novel features observed in Raman experiments on optimally doped and underdoped Bi-2212 compounds in B1g geometry can be explained by a strong fermionic self-energy due to the…Andrey V. Chubukov, Dirk. K. Morr, Girsh Blumberg·Aug 27, 1999SaveLearn