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

• 来源期刊: 中国物理(英文版)
• 学科: 物理学
• 关键词: coherent information exchange information thermal radiation channel integral within ordered product of operators
• 年，卷（期）: 2001,（9）
• 所属期刊栏目: GENERAL
• 页码范围: 779-782
• 页数: 4页
• 分类号: O4
• 语种: 英文

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".