Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 10306-010306.doi: 10.1088/1674-1056/22/1/010306

• GENERAL • 上一篇    下一篇

Creation of quantum correlations via the initial classical-mixed states

韩伟, 张英杰, 夏云杰   

  1. Key Laboratory of Laser Polarization and Information Technology of Shandong Province, Department of Physics, Qufu Normal University, Qufu 273165, China
  • 收稿日期:2012-06-14 修回日期:2012-07-06 出版日期:2012-12-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178012 and 10947006), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20093705110001), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2012FQ024), and the Research Funds from Qufu Normal University, China (Grant Nos. XJ201013, XJ201219, and BSQD20110132).

Creation of quantum correlations via the initial classical-mixed states

Han Wei (韩伟), Zhang Ying-Jie (张英杰), Xia Yun-Jie (夏云杰)   

  1. Key Laboratory of Laser Polarization and Information Technology of Shandong Province, Department of Physics, Qufu Normal University, Qufu 273165, China
  • Received:2012-06-14 Revised:2012-07-06 Online:2012-12-01 Published:2012-12-01
  • Contact: Xia Yun-Jie E-mail:yjxia@mail.qfnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178012 and 10947006), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20093705110001), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2012FQ024), and the Research Funds from Qufu Normal University, China (Grant Nos. XJ201013, XJ201219, and BSQD20110132).

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摘要： Using the pseudomode method, we theoretically analyze the creation of quantum correlations between two two-level dipole-dipole interacting atoms coupled with a common structured reservoir with different coupling strengths. Considering certain classes of initial separable-mixed states, we demonstrate that the sudden birth of atomic entanglement as well as the generation of stationary quantum correlations occur. Our results also suggest a possible way to control the occurrence time of entanglement sudden birth and the stationary value of quantum correlations by modifying the initial conditions of states, the dipole-dipole interaction, and the relative coupling strength. These results are helpful for the experimental engineering of entanglement and quantum correlations.

关键词: quantum correlation, quantum entanglement, quantum discord, pseudomode method

Abstract: Using the pseudomode method, we theoretically analyze the creation of quantum correlations between two two-level dipole-dipole interacting atoms coupled with a common structured reservoir with different coupling strengths. Considering certain classes of initial separable-mixed states, we demonstrate that the sudden birth of atomic entanglement as well as the generation of stationary quantum correlations occur. Our results also suggest a possible way to control the occurrence time of entanglement sudden birth and the stationary value of quantum correlations by modifying the initial conditions of states, the dipole-dipole interaction, and the relative coupling strength. These results are helpful for the experimental engineering of entanglement and quantum correlations.

Key words: quantum correlation, quantum entanglement, quantum discord, pseudomode method

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn
03.65.Yz (Decoherence; open systems; quantum statistical methods) 42.50.-p (Quantum optics) 71.55.Jv (Disordered structures; amorphous and glassy solids)