Oscillatory stability of quantum droplets in PT-symmetric optical lattice

被引：6
作者：
Lao, Jiehong [1 ,2 ]
Zhou, Zheng [3 ]
Zhang, Xili [1 ,2 ]
Ye, Fuqiu [4 ]
Zhong, Honghua [5 ]
机构：
[1] Hunan Normal Univ, Dept Phys, Minist Educ, Changsha 410081, Peoples R China
[2] Hunan Normal Univ, Key Lab Lowdimens Quantum Struct & Quantum Contro, Minist Educ, Changsha 410081, Peoples R China
[3] Hunan Inst Technol, Dept Phys, Hengyang 421002, Peoples R China
[4] Jishou Univ, Dept Phys, Jishou 416000, Peoples R China
[5] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2021年 / 73卷 / 06期
基金：
中国国家自然科学基金;
关键词：
quantum droplets; PT symmetry; optical lattice;
D O I：
10.1088/1572-9494/abf093
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study stability and collisions of quantum droplets (QDs) forming in a binary bosonic condensate trapped in parity-time (PT)-symmetric optical lattices. It is found that the stability of QDs in the PT-symmetric system depends strongly on the values of the imaginary part W-0 of the PT-symmetric optical lattices, self-repulsion strength g, and the condensate norm N. As expected, the PT-symmetric QDs are entirely unstable in the broken PT-symmetric phase. However, the PT-symmetric QDs exhibit oscillatory stability with the increase of N and g in the unbroken PT-symmetric phase. Finally, collisions between.. -symmetric QDs are considered. The collisions of droplets with unequal norms are completely different from that in free space. Besides, a stable PT-symmetric QDs collides with an unstable ones tend to merge into breathers after the collision.
引用
收藏
页数：7
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