Oscillatory stability of quantum droplets in $\text{}{ \mathcal P }{ \mathcal T }$-symmetric optical lattice

Jiehong Lao,Zheng Zhou,Xili Zhang,Fuqiu Ye,Honghua Zhong

Figure 1. (a) Typical profile of ${ \mathcal P }{ \mathcal T }$-symmetric optical lattices, where black solid line represents real part, and red imaginary line describes imaginary part. (b) Band-gap structure of ${ \mathcal P }{ \mathcal T }$-symmetric optical lattices. Red solid line: V0 = 0.3, W0 = 0.01. Blue imaginary line: V0 = 0.3, W0 = 0.15. Green dotted-dashed line: V0 = 0.3, W0 = 0.3. (c) Imaginary part of complex eigenvalues corresponding to (b).