Enhancing quantum temporal steering via frequency modulation  

作　　者：吴孟凯 程维文 Mengkai Wu;Weiwen Cheng(Institute of Signal Processing & Transmission,Nanjing University of Posts and Telecommunication,Nanjing 210003,China)

机构地区：[1]Institute of Signal Processing & Transmission,Nanjing University of Posts and Telecommunication,Nanjing 210003,China

出　　处：《Chinese Physics B》2024年第5期239-245,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.62375140)。

摘　　要：Various strategies have been proposed to harness and protect space-like quantum correlations in different models under decoherence.However,little attention has been given to temporal-like correlations,such as quantum temporal steering(TS),in this context.In this work,we investigate TS in a frequency-modulated two-level system coupled to a zero-temperature reservoir in both the weak and strong coupling regimes.We analyze the impact of various frequency-modulated parameters on the behavior of TS and non-Markovian.The results demonstrate that appropriate frequency-modulated parameters can enhance the TS of the two-level system,regardless of whether the system is experiencing Markovian or non-Markovian dynamics.Furthermore,a suitable ratio between modulation strength and frequency(i.e.,all zeroes of the 0th Bessel function J_(0)(δ/?))can significantly enhance TS in the strong coupling regime.These findings indicate that efficient and effective manipulation of quantum TS can be achieved through a frequency-modulated approach.

关 键 词：quantum temporal steering frequency modulation DECOHERENCE 

分 类 号：O413[理学—理论物理]