标题： 非局部PT对称超晶格支持的缺陷孤子 显示英文标题

标题： Defect solitons supported by nonlocal PT symmetric superlattices

摘要： 具有非局部非线性的宇称-时间（PT）对称超晶格支持的缺陷孤子的存在性和稳定性被研究。 在无限间隙中，同相孤子对于正缺陷或零缺陷可以稳定存在，但在存在强非局部性负缺陷的情况下无法存在。 在第一间隙中，对于正缺陷或零缺陷，反相孤子是稳定的，而对于负缺陷，同相孤子是稳定的。 研究了孤子稳定性与PT势调制深度的依赖关系。 有趣的是，当PT势高于相变点时，正缺陷和零缺陷的孤子可以稳定存在。 显示英文摘要

摘要： The existence and stability of defect solitons supported by parity-time (PT) symmetric superlattices with nonlocal nonlinearity are investigated. In the semi-infinite gap, in-phase solitons are found to exist stably for positive or zero defects, but can not exist in the presence of negative defects with strong nonlocality. In the first gap, out-of-phase solitons are stable for positive or zero defects, whereas in-phase solitons are stable for negative defects. The dependence of soliton stabilities on modulation depth of the PT potentials is studied. It is interesting that solitons can exist stably for positive and zero defects when the PT potentials are above the phase transition points.