In this paper, by using the method of integration within the ordered product of operators and entangled state representation, the degree of second-order coherence of coherent state evolving in a laser channel is derived for the first time, which exhibits its anti-bunching property. The master equation of the laser channel is solved by entangled state representation, and the cumulant for deriving mean and mean-square photon numbers is evaluated.
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Zhang et al. (2024) studied this question.
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