Entanglement enhancement of bipartite entangled states through coherent feedback control

被引：0
作者：
Li, Fang [1 ]
Zhou, Yaoyao [1 ]
Jia, Xiaojun [1 ]
机构：
[1] State Kay Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, 030006, Shanxi
来源：
Guangxue Xuebao/Acta Optica Sinica | 2014年 / 34卷 / 10期
关键词：
Bipartite entangled states of light; Coherent feedback control; Entanglement enhancement; Quantum correlation noise; Quantum optics;
D O I：
10.3788/AOS201434.1027001
中图分类号：
学科分类号：
摘要：
Einstein-Podolsky-Rosen (EPR) entangled state is an essential resource in quantum information and quantum computation. With the deep development of research, bipartite entangled states of light with high entangled degree should be obtained firstly to complete quantum information processing efficiently. It has been proved an effective method to improve the quality of entangled light field by manipulation of entangled states of light. Coherent feedback control has been proved to enhance the squeezed degree of the squeezed state light field because of bring no additional noise to the optical parametric system. We theoretically calculate the relationship between the quantum correlation noise of the EPR entangled state generated from coherent feedback control non-degenerate optical parametric amplifier and various parameters of the total system, and the influence of these parameters on the entanglement enhancement is also analyzed detailedly. This provides references for further research on the EPR entangled state with higher entangled degree.
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页数：6
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  • [1] Galindo A., Martin-Delgado M.A., Information and computation: Classical and quantum aspects, 74, 2, pp. 347-423, (2002)
  • [2] Furusawa A., Takei N., Quantum teleportation for continuous variables and related quantum information processing, 443, 3, pp. 97-119, (2007)
  • [3] Menicucci N.C., Van Loock P., Gu M., Et al., Universal quantum computation with continuous variable cluster states, 97, 11, (2006)
  • [4] Jia X.J., Su X.L., Pan Q., Et al., Experimental demonstration of unconditional entanglement swapping for continuous variables, 93, 25, (2004)
  • [5] Sun C., Zhang Y., Meng X., Et al., A study on the pairwise concurrence entanglement in the multipartite open system, Acta Optica Sinica, 30, 12, pp. 3604-3609, (2010)
  • [6] Lu D., Entanglement properties in the system of atoms interaction, Acta Optica Sinica, 32, 2, (2012)
  • [7] Zhao Y., Hao S., Su X., Et al., Generation system of continuous-variable six-partite and eight-partite star cluster entangled states, Acta Optica Sinica, 32, 6, (2012)
  • [8] Ou Z.Y., Pereira S.F., Kimble H.J., Et al., Realization of Einstein-Podolsky-Rosen paradox for continuous variables, 68, 25, pp. 3663-3663, (1992)
  • [9] Pereira S.F., Peng K.C., Kimble H.J., Squeezed State Generation and Nonclassical Correlations in Nondegenerate Parametric Down Conversion, Coherence and Quantum Optics VI, pp. 889-890, (1989)
  • [10] Wang Y., Shen H., Jin X.L., Et al., Experimental generation of 6 dB continuous variable entanglement from a non-degenerate optical parametric amplifier, 18, 6, pp. 6149-6155, (2010)
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