›› 2014, Vol. 23 ›› Issue (11): 110306-110306.doi: 10.1088/1674-1056/23/11/110306

• GENERAL • 上一篇    下一篇

Quantum correlation switches for dipole arrays

李艳杰, 刘金明, 张燕   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 收稿日期:2014-01-28 修回日期:2014-05-04 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174081, 11034002, 11134003, 11104075, and 60708003), the National Basic Research Program of China (Grant Nos. 2011CB921602 and 2012CB821302), and the Open Fund from the State Key Laboratory of Precision Spectroscopy of East China Normal University, China.

Quantum correlation switches for dipole arrays

Li Yan-Jie (李艳杰), Liu Jin-Ming (刘金明), Zhang Yan (张燕)   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • Received:2014-01-28 Revised:2014-05-04 Online:2014-11-15 Published:2014-11-15
  • Contact: Liu Jin-Ming E-mail:jmliu@phy.ecnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174081, 11034002, 11134003, 11104075, and 60708003), the National Basic Research Program of China (Grant Nos. 2011CB921602 and 2012CB821302), and the Open Fund from the State Key Laboratory of Precision Spectroscopy of East China Normal University, China.

摘要: We investigate the characteristics of three kinds of quantum correlations, measured by pairwise quantum discord (QD), geometric measure of quantum discord (GMQD), and measurement-induced disturbance (MID), in the systems of three- and four-dipole arrays. The influence of the temperature on the three quantum correlations and entanglement of the systems is also analyzed numerically. It is found that novel quantum correlation switches called QD, GMQD, and MID respectively can be constructed with the qubits consisting of electric dipoles coupled by the dipole-dipole interaction and oriented along or against the external electric field. Moreover, with the increase of temperature, QD, GMQD, and MID are more robust than entanglement against the thermal environment. It is also found that for each dipole pair of the three- and four-dipole arrangements, the MID is always the largest and the GMQD the smallest.

关键词: dipole arrays, quantum discord, geometric measure of quantum discord, measurement-induced disturbance

Abstract: We investigate the characteristics of three kinds of quantum correlations, measured by pairwise quantum discord (QD), geometric measure of quantum discord (GMQD), and measurement-induced disturbance (MID), in the systems of three- and four-dipole arrays. The influence of the temperature on the three quantum correlations and entanglement of the systems is also analyzed numerically. It is found that novel quantum correlation switches called QD, GMQD, and MID respectively can be constructed with the qubits consisting of electric dipoles coupled by the dipole-dipole interaction and oriented along or against the external electric field. Moreover, with the increase of temperature, QD, GMQD, and MID are more robust than entanglement against the thermal environment. It is also found that for each dipole pair of the three- and four-dipole arrangements, the MID is always the largest and the GMQD the smallest.

Key words: dipole arrays, quantum discord, geometric measure of quantum discord, measurement-induced disturbance

中图分类号:  (Quantum information)

  • 03.67.-a
03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.65.Ud (Entanglement and quantum nonlocality)