Finite temperature effects in two-mode bosonic Josephson junctions

被引：3
作者：
Mazzarella, G. [1 ]
Salasnich, L.
Toigo, F.
机构：
[1] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35131 Padua, Italy
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2012年 / 45卷 / 18期
关键词：
ANTIFERROMAGNETIC MOLECULAR RINGS; BOSE-EINSTEIN CONDENSATE; SPIN DYNAMICS; DOUBLE-WELL; SUPERPOSITION STATES; GASES; COHERENT;
D O I：
10.1088/0953-4075/45/18/185301
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We analyze the effects of temperature on a bosonic Josephson junction realized with ultracold and dilute atoms in a double-well potential. Starting from the eigenstates of the two-site Bose-Hubbard Hamiltonian, we calculate the coherence visibility and the fluctuation of the on-site occupation number and study them as functions of temperature. We show that, contrary to naive expectations, when the boson-boson interaction is suitably chosen thermal effects can increase the coherence visibility and reduce the on-site number fluctuation.
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页数：7
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