中国物理B ›› 2001, Vol. 10 ›› Issue (9): 779-782.doi: 10.1088/1009-1963/10/9/301

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COHERENT INFORMATION ON THERMAL RADIATION NOISE CHANNEL: AN APPROACH OF INTEGRAL WITHIN ORDERED PRODUCT OF OPERATORS

仇佩亮1, 陈小余2   

  1. (1)Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; (2)Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; Division of Physics, China Institute of Metrology, Hangzhou 310034, China
  • 收稿日期:2001-02-16 修回日期:2001-04-19 出版日期:2001-09-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 60002003).

COHERENT INFORMATION ON THERMAL RADIATION NOISE CHANNEL: AN APPROACH OF INTEGRAL WITHIN ORDERED PRODUCT OF OPERATORS

Chen Xiao-yu (陈小余)ab, Qiu Pei-liang (仇佩亮)a   

  1. a Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; b Division of Physics, China Institute of Metrology, Hangzhou 310034, China
  • Received:2001-02-16 Revised:2001-04-19 Online:2001-09-15 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 60002003).

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摘要： An analytical expression is given to the coherent information of the thermal radiation signal transmitted over the thermal radiation noise channel, one of the most essential quantum Gaussian channels. Focusing on the single normal mode of the thermal radiation signal and noise, we resolve the entangled state density operator, which characterizes quantum information transmission, into a direct product of two parts, with each part being a thermal radiation density operator. The calculation is aided by the technique known as "integral within ordered product of operators".

Abstract: An analytical expression is given to the coherent information of the thermal radiation signal transmitted over the thermal radiation noise channel, one of the most essential quantum Gaussian channels. Focusing on the single normal mode of the thermal radiation signal and noise, we resolve the entangled state density operator, which characterizes quantum information transmission, into a direct product of two parts, with each part being a thermal radiation density operator. The calculation is aided by the technique known as "integral within ordered product of operators".

Key words: coherent information, exchange information, thermal radiation channel, integral within ordered product of operators

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 05.40.Ca (Noise)