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

页数：7

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