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.
基金
supported by the National Natural Science Foundation of China under Grant No.11805283
The Hunan Provincial Natural Science Foundation under Grant No.2019JJ30044 and No.2019JJ40060
The Scientific Research Fund of Hunan Provincial Education Department of China under Grant No.19A510 and No.20B162。
