中国物理B ›› 2015, Vol. 24 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/24/12/120301

• GENERAL • 上一篇    下一篇

Thermal vacuum state corresponding to squeezed chaotic light and its application

万志龙a b, 范洪义b, 王震a   

  1. a School of Mathematical and Chemical Industry, Changzhou Institute of Technology, Changzhou 213002, China;
    b Department of Material Science and Engineering, University of Science and Technology of China, Heifei 230026, China
  • 收稿日期:2015-06-28 修回日期:2015-08-13 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: Fan Hong-Yi E-mail:fhym@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11175113, 11447202, and 11574295).

Thermal vacuum state corresponding to squeezed chaotic light and its application

Wan Zhi-Long (万志龙)a b, Fan Hong-Yi (范洪义)b, Wang Zhen (王震)a   

  1. a School of Mathematical and Chemical Industry, Changzhou Institute of Technology, Changzhou 213002, China;
    b Department of Material Science and Engineering, University of Science and Technology of China, Heifei 230026, China
  • Received:2015-06-28 Revised:2015-08-13 Online:2015-12-05 Published:2015-12-05
  • Contact: Fan Hong-Yi E-mail:fhym@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11175113, 11447202, and 11574295).

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摘要： For the density operator (mixed state) describing squeezed chaotic light (SCL) we search for its thermal vacuum state (a pure state) in the real-fictitious space. Using the method of integration within ordered product (IWOP) of operators we find that it is a kind of one-and two-mode combinatorial squeezed state. Its application in evaluating the quantum fluctuation of photon number reveals: the stronger the squeezing is, the larger a fluctuation appears. The second-order degree of coherence of SCL is also deduced which shows that SCL is classic. The new thermal vacuum state also helps to derive the Wigner function of SCL.

关键词: thermal vacuum state, squeezed chaotic light, quantum fluctuation of photon number, second-order degree of coherence

Abstract: For the density operator (mixed state) describing squeezed chaotic light (SCL) we search for its thermal vacuum state (a pure state) in the real-fictitious space. Using the method of integration within ordered product (IWOP) of operators we find that it is a kind of one-and two-mode combinatorial squeezed state. Its application in evaluating the quantum fluctuation of photon number reveals: the stronger the squeezing is, the larger a fluctuation appears. The second-order degree of coherence of SCL is also deduced which shows that SCL is classic. The new thermal vacuum state also helps to derive the Wigner function of SCL.

Key words: thermal vacuum state, squeezed chaotic light, quantum fluctuation of photon number, second-order degree of coherence

中图分类号:  (Quantum mechanics)

  • 03.65.-w
03.65.Yz (Decoherence; open systems; quantum statistical methods) 05.30.-d (Quantum statistical mechanics) 42.50.-p (Quantum optics)