Quantum carpets:efficiently probing fractional revivals in position-dependent mass systems

作     者：Tooba Bibi Sunia Javed Shahid Iqbal 

作者机构：Department of PhysicsSchool of Natural SciencesNational University of Sciences and TechnologyH-12 IslamabadPakistan 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2023年第75卷第1期

页      面：46-54页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Financial support from Higher Education Commission(HEC)of Pakistan under Grant No.20-14808/NRPU/R&D/HEC/20212021 

主　　题：wave-packet dynamics quantum carpets information carpets quantum revivals fractional revivals position-dependent mass schroedinger equation 

摘      要：Position-dependent-mass systems are of great importance in many physical situations,such as the transport of charge carriers in semiconductors with non-uniform composition and in the theory of many-body interactions in condensed *** we investigate,numerically and analytically,the phenomenon of fractional revivals in such systems,which is a generic characteristic manifested by the wave-packet evolution in bounded Hamiltonian *** the fractional revivals using specific probes is an important task in the theory of quantum measurement and *** numerically simulate the temporal evolution of probability density and information entropy density,which manifest self-similarly recurring interference patterns,namely,quantum *** numerical results show that the quantum carpets not only serve as an effective probe for recognizing the fractional revivals of various order but they efficiently describe the effect of spatially-varying mass on the structure of fractional revivals,which is manifested as a symmetry breaking in their designs.