Effects of quantum fluctuations on macroscopic quantum tunneling and self-trapping of a BEC in a double-well trap

被引：4
|
作者：
Abdullaev, Fatkhulla Kh [1 ]
Galimzyanov, Ravil M. [1 ]
Shermakhmatov, Akbar M. [1 ,2 ]
机构：
[1] Uzbek Acad Sci, Phys Tech Inst, 84, Tashkent 100084, Uzbekistan
[2] TIIAME Natl Res Univ, Tashkent 100000, Uzbekistan
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2023年 / 56卷 / 16期
关键词：
BEC; double-well; Lee-Huang-Yang correction; quantum fluctuations; tunneling; DROPLETS;
D O I：
10.1088/1361-6455/ace66d
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we study the influence of quantum fluctuations (QFs) on the macroscopic quantum tunneling and self-trapping (ST) of a two-component Bose-Einstein condensate in a double-well trap. QFs are described by the Lee-Huang-Yang (LHY) term in the modified Gross-Pitaevskii (GP) equation. Employing the modified GP equation in a scalar approximation, we derive a dimer model using a two-mode approximation. The frequencies of Josephson oscillations and ST conditions under QFs are found analytically and proven by numerical simulations of the modified GP equation. The tunneling and localization phenomena are also investigated for the case of the LHY fluid loaded in a double-well potential.
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页数：9
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