期刊
NEW JOURNAL OF PHYSICS
卷 22, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab965d
关键词
Bose-Einstein condensation; dephasing; rephasing; one-dimensional; Josephson tunneling
资金
- BIRD Project 'Time-dependent density functional theory of quantum atomic mixtures' of the University of Padova
We study the quantum tunneling of two one-dimensional quasi-condensates made of alkali-metal atoms, considering two different tunneling configurations: side-by-side and head-to-tail. After deriving the quasiparticle excitation spectrum, we discuss the dynamics of the relative phase following a sudden coupling of the independent subsystems. In particular, we calculate the coherence factor of the system, which, due to the nonzero tunneling amplitude, it exhibits dephasing-rephasing oscillations instead of pure dephasing. These oscillations are enhanced by a higher tunneling energy, and by higher system densities. Our predictions provide a benchmark for future experiments at temperatures belowT less than or similar to 5 nK.
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