量子电子学报

• 量子光学 • 上一篇    下一篇

两能级系统耦合多个玻色热库中量子速度极限研究

王 琼1,2,贺 志2,余 敏2   

  1. 1 长沙师范学院初等教育学院,湖南 长沙 410100; 2 湖南文理学院数理学院,湖南 常德 415000
  • 出版日期:2019-09-28 发布日期:2019-09-18
  • 作者简介:王 琼(1983-),湖南衡阳人,博士,副教授,主要从事量子光学方面的研究。E-mail:zuiguiyixiu@163.com
  • 基金资助:
    Supported by National Natural Science Foundation of China (国家自然科学基金,61605019,61505053), China Postdoctoral Science Foundation (中国博士后科学基金, 2017M622582),Research Foundation of Education Bureau of Hunan Province (湖南省教育厅优秀青年项目, 16B177,18B601)

Quantum speed limit of a two-level system coupled to multiple Bosonic reservoirs

WANG Qiong1,2, HE Zhi2, YU Min2   

  1. 1 Junior Education Department, Changsha Normal University, Changsha 410100, China; 2 College of Mathematics and Physics Science, Hunan University of Arts and Science, Changde 415000, China
  • Published:2019-09-28 Online:2019-09-18

摘要: 研究了一个二能级原子与多个玻色热库耦合的物理模型,得到了该模型量子速度极限的解析表达式。分析表明,只要热库的数量满足一定的条件,不管是强耦合还是弱耦合,系统都会表现为非马尔科夫效应;数值模拟表明,系统的非马尔可夫效应会随着热库数增加呈现不断增加的趋势。进一步研究表明,非马尔科夫效应越强,量子系统的演化加速得越快。

关键词: 量子光学, 量子速度极限, 非马尔可夫效应, 多个玻色热库

Abstract: A physical model for a two-level atom simultaneously coupled to multiple Bosonic reservoirs is investigated. The explicit expression of quantum speed limit is obtained. Analysis show that as long as the number of reservoirs satisfies certain conditions, whether it is strong coupling or weak coupling, the system will show a non-Markov effect. Numerical simulation show that the non-Markovian effect of the system increases with the increase of reservoir number. Further investigation shows that the stronger the non-Markov effect is, the faster the evolution acceleration of quantum system will be.

Key words: quantum optics, quantum speed limit, non-Markovian effect, multiple Bosonic reservoirs