Floquet scattering through a parity–time symmetric oscillating potential  

作　　者：曹序桢 梁兆新 胡颖 Xuzhen Cao;Zhaoxin Liang;Ying Hu(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;Department of Physics,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [3]Department of Physics,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Chinese Physics B》2023年第3期79-86,共8页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant No.2017YFA0304203);the National Natural Science Foundation of China(Grant No.11874038);the Zhejiang Provincial Natural Science Foundation(Grant No.LZ21A040001);the National Natural Science Foundation of China(Grant No.12074344);the Key Projects of the Natural Science Foundation of China(Grant No.11835011).

摘　　要：We investigate the scattering of a particle from a trapping potential that is subjected to weak,parity–time symmetric periodic drivings.Using the Floquet theory,we derive the scattering matrix and calculate the transmittance of the incident particle.When the driving is purely coherent,our calculation recovers the known result and the transmission spectrum shows the familiar,bound-state-induced Fano resonances.When the driving is purely incoherent,we find the Fano resonances still occur,but the lineshape of each resonance is reversed compared to the coherent-driving counterpart.Intriguingly,the transmission resonances disappear when both the coherent and incoherent driving fields are present with equal amplitudes.This phenomena can be seen as a manifestation of the non-reciprocal coupling of Floquet channels in the frequency domain.Notably,when the frequency up-conversion is absent,the transmission is such as if there is no driving at all,even when the driving strength increases.

关 键 词：open system periodic driving SCATTERING 

分 类 号：O413.1[理学—理论物理]