arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2404.04537physics.opticscond-mat.dis-nnquant-ph
收藏

非厄米光子准晶体中的鲁棒安德森相变

Robust Anderson transition in non-Hermitian photonic quasicrystals

Stefano Longhi

AI总结:

本文研究非厄米光子准晶体中的安德森相变,证明在局域非公度增益和损耗作用下,该相变对退相干效应具有鲁棒性,并通过光子网格晶格中的合成准晶体加以验证。

摘要:

安德森局域化,即在具有随机或非公度无序的晶格中扩散受到抑制,是一种脆弱的干涉现象,在存在退相干效应或涨落无序时会被破坏。因此,在厄米系统中观察到的安德森局域化-退局域化相变,例如一维准晶体中当非公度势的幅度增加到阈值以上时出现的相变,在考虑退相干效应时会被抹去。本文考虑了具有局域非公度增益和损耗的非厄米准晶体中出现的局域化-退局域化谱相变,并证明与厄米情况相反,非厄米相变对退相干效应具有鲁棒性。通过考虑光子网格晶格中的合成准晶体来说明这些结果。

英文摘要:

Anderson localization, i.e. the suppression of diffusion in lattices with random or incommensurate disorder, is a fragile interference phenomenon which is spoiled out in the presence of dephasing effects or fluctuating disorder. As a consequence, Anderson localization-delocalization phase transitions observed in Hermitian systems, such as in one-dimensional quasicrystals when the amplitude of the incommensurate potential is increased above a threshold, are washed out when dephasing effects are included. Here we consider localization-delocalization spectral phase transitions occurring in non-Hermitian quasicrystals with local incommensurate gain and loss, and show that, contrary to the Hermitian case, the non-Hermitian phase transition is robust against dephasing effects. The results are illustrated by considering synthetic quasicrystals in photonic mesh lattices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑