Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment

doi:10.1088/1674-1056/28/3/030301

中国物理B ›› 2019, Vol. 28 ›› Issue (3): 30301-030301.doi: 10.1088/1674-1056/28/3/030301

Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment

Xiao-Lan Wang(王晓岚), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生)

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

收稿日期:2018-09-06 修回日期:2018-12-10 出版日期:2019-03-05 发布日期:2019-03-05
通讯作者: Hao-Sheng Zeng E-mail:hszeng@hunnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11275064), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20124306110003), and the Construct Program of the National Key Discipline, China.

Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment

Xiao-Lan Wang(王晓岚), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生)

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China

Received:2018-09-06 Revised:2018-12-10 Online:2019-03-05 Published:2019-03-05
Contact: Hao-Sheng Zeng E-mail:hszeng@hunnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11275064), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20124306110003), and the Construct Program of the National Key Discipline, China.

摘要/Abstract

摘要： The exactly analytical solution for the dynamics of the dissipative Λ-type atom in the zero-temperature Lorentzian environment is presented. On this basis, we study the evolution of the population and entanglement. We find that the stable populations on the two lower levels of the Λ-type atom can be effectively adjusted by the combination of the relative decay rate and the environmental spectral frequency. However, for the initial Werner-like state, the stable entanglement between the two Λ-type atoms has very little tunability. Furthermore, the stable entanglement for the bilateral environment case is larger than that of the unilateral environmental case. A nonintuitive relation between the stable entanglement and stable population is found.

关键词: open quantum systems, population, entanglement

Abstract: The exactly analytical solution for the dynamics of the dissipative Λ-type atom in the zero-temperature Lorentzian environment is presented. On this basis, we study the evolution of the population and entanglement. We find that the stable populations on the two lower levels of the Λ-type atom can be effectively adjusted by the combination of the relative decay rate and the environmental spectral frequency. However, for the initial Werner-like state, the stable entanglement between the two Λ-type atoms has very little tunability. Furthermore, the stable entanglement for the bilateral environment case is larger than that of the unilateral environmental case. A nonintuitive relation between the stable entanglement and stable population is found.

Key words: open quantum systems, population, entanglement

中图分类号: (Foundations of quantum mechanics; measurement theory)

03.65.Ta

03.65.Yz (Decoherence; open systems; quantum statistical methods) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)

王晓岚, 任玉坤, 曾浩生. Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment[J]. 中国物理B, 2019, 28(3): 30301-030301.

Xiao-Lan Wang(王晓岚), Yu-Kun Ren(任玉坤), Hao-Sheng Zeng(曾浩生). Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment[J]. Chin. Phys. B, 2019, 28(3): 30301-030301.

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Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment

Dynamical control of population and entanglement for open Λ-type atoms by engineering the environment

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