Oscillatory stability of quantum droplets in PT-symmetric optical lattice

• 作者: Jiehong Lao Zheng Zhou Xili Zhang Fuqiu Ye Honghua Zhong
• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: QUANTUM PHYSICS AND QUANTUM INFORMATION
• 页码范围: 59-65
• 页数: 7页
• 语种: 英文

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 W0 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 PT-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.