Condensate depletion in two-species Bose gases: A variational quantum Monte Carlo study
نویسندگان
چکیده
A. R. Sakhel, J. L. DuBois, and H. R. Glyde Faculty of Engineering Technology, Al-Balqa Applied University, Amman 11134, Jordan Department of Chemistry, University of California, Berkeley, 19 Gilman Hall, Berkeley, California 94720-1460, USA Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA Received 25 February 2007; revised manuscript received 13 February 2008; published 24 April 2008
منابع مشابه
Unitary Dynamics of Strongly Interacting Bose Gases with the Time-Dependent Variational Monte Carlo Method in Continuous Space
We introduce the time-dependent variational Monte Carlo method for continuous-space Bose gases. Our approach is based on the systematic expansion of the many-body wave function in terms of multibody correlations and is essentially exact up to adaptive truncation. The method is benchmarked by comparison to an exact Bethe ansatz or existing numerical results for the integrable Lieb-Liniger model....
متن کاملQuantum-Monte-Carlo Calculations for Bosons in a Two-Dimensional Harmonic Trap
Path-Integral-Monte-Carlo simulation has been used to calculate the properties of a two-dimensional (2D) interacting Bose system. The bosons interact with hard-core potentials and are confined to a harmonic trap. Results for the density profiles, the condensate fraction, and the superfluid density are presented. By comparing with the ideal gas we easily observe the effects of finite size and th...
متن کاملPath-Integral Monte Carlo And The Squeezed Trapped Bose-Einstein Gas
Bose-Einstein condensation has been experimentally found to take place in finite trapped systems when one of the confining frequencies is increased until the gas becomes effectively two-dimensional (2D). We confirm the plausibility of this result by performing path-integral Monte Carlo (PIMC) simulations of trapped Bose gases of increasing anisotropy and comparing them to the predictions of fin...
متن کاملPositive P simulations of spin squeezing in a two-component Bose condensate
The collisional interaction in a Bose condensate represents a non-linearity which in analogy with non-linear optics gives rise to unique quantum features. In this paper we apply a Monte Carlo method based on the positive P pseudo-probability distribution from quantum optics to analyze the efficiency of spin squeezing by collisions in a two-component condensate. The squeezing can be controlled b...
متن کاملBose-Einstein condensation in trapped bosons: A variational Monte Carlo analysis
Several properties of trapped hard-sphere bosons are evaluated using variational Monte Carlo techniques. A trial wave function composed of a renormalized single-particle Gaussian and a hard-sphere Jastrow function for pair correlations is used to study the sensitivity of condensate and noncondensate properties to the hardsphere radius and the number of particles. Special attention is given to d...
متن کامل