Quantum speedup and non-Markovianity of an atom in structured reservoirs:pseudomodes as a good description of environmental memory  

作　　者：Maryam Hadipour Soroush Haseli Saeed Haddadi 

机构地区：[1]Faculty of Physics,Urmia University of Technology,Urmia,Iran [2]School of Physics,Institute for Research in Fundamental Sciences(IPM),PO Box 19395-5531,Tehran,Iran [3]Faculty of Physics,Semnan University,PO Box 35195-363,Semnan,Iran

出　　处：《Communications in Theoretical Physics》2024年第8期60-66,共7页理论物理通讯（英文版）

基　　金：supported by Semnan University under Contract No. 21270。

摘　　要：Following the recent paper(Teittinen et al 2019 New J. Phys. 21 123041), one can see that in general there is no simple relation between non-Markovianity and quantum speed limit. Here, we investigate the connection between quantum speed limit time and non-Markovianity of an atom in structured environments(reservoirs) whose dynamics is governed by an exact pseudomode master equation(Garraway 1997 Phys. Rev. A 55 2290). In particular, we find an inverse relation between them, which means that the non-Markovian feature of the quantum process leads to speedup of evolution. Thus, there is a link between quantum speedup and memory effects for specific cases of dynamical evolution. Our results might shed light on the relationship between the speedup of quantum evolution and the backflow of information from the environment to the system.

关 键 词：quantum speed limit non-Markovianity pseudomode method structured environments 

分 类 号：O413.1[理学—理论物理]