中国物理B ›› 2015, Vol. 24 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/24/12/120301
万志龙a b, 范洪义b, 王震a
Wan Zhi-Long (万志龙)a b, Fan Hong-Yi (范洪义)b, Wang Zhen (王震)a
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.
中图分类号: (Quantum mechanics)