Thermal vacuum state corresponding to squeezed chaotic light and its application

doi:10.1088/1674-1056/24/12/120301

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.

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

Received: 28 June 2015
Revised: 13 August 2015
Accepted manuscript online:

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

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11175113, 11447202, and 11574295).

Corresponding Authors: Fan Hong-Yi
E-mail: fhym@ustc.edu.cn

Cite this article:

Wan Zhi-Long (万志龙), Fan Hong-Yi (范洪义), Wang Zhen (王震) Thermal vacuum state corresponding to squeezed chaotic light and its application 2015 Chin. Phys. B 24 120301

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