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17 papers · 2 filters
Three-body loss in lithium from functional renormalization
R. Schmidt, S. Floerchinger, C. Wetterich
We use functional integral methods for an estimate of the three-body loss in a three-component Li ultracold atom gas. We advocate a simple picture where the loss proceeds by th…
The granularity of weakly occupied bosonic fields beyond the local density approximation
M. Eckart, R. Walser, W. P. Schleich +2
We examine ground state correlations for repulsive, quasi one-dimensional bosons in a harmonic trap. In particular, we focus on the few particle limit N=2,3,4,..., where exact nume…
Studying the single--electron transistor by photoionization
Ioan Baldea, Horst Koppel
We present theoretical results demonstrating that photoionization can be a useful tool for investigating single--electron transistors. Suggestions are given on how to conduct exper…
Squeezing and entanglement in a Bose-Einstein condensate
J. Esteve, C. Gross, A. Weller +2
Entanglement, a key feature of quantum mechanics, is a resource that allows the improvement of precision measurements beyond the conventional bound reachable by classical means. Th…
Dissipation induced coherence of a two-mode Bose-Einstein condensate
D. Witthaut, F. Trimborn, S. Wimberger
We discuss the dynamics of a Bose-Einstein condensate in a double-well trap subject to phase noise and particle loss. The phase coherence of a weakly-interacting condensate as well…
Mean-field dynamics of a two-mode Bose-Einstein condensate subject to noise and dissipation
F. Trimborn, D. Witthaut, S. Wimberger
We discuss the dynamics of an open two-mode Bose-Hubbard system subject to phase noise and particle dissipation. Starting from the full many-body dynamics described by a master equ…