Abstract:
Quantum interference in phase space is a technology that combines the superposition of quantum states with the concept of classical interference, and specifically and deeply reveals the physical mechanism of non-classical quantum states. In this paper, the phase space quantum interference technique is used to calculate and analyze the Schrödinger cat states with increasing photon numbers. The variation law and influencing factors of the photon number distribution of Schrödinger cat and the parameters such as Mandel
Q and Wigner function, that characterize the non-classical properties of quantum state are discussed under the condition of differently increasing photon numbers. It was found that with the increase of the photon number variation parameter, the distribution probability of phase Schrödinger's cat state in multi-photon number state would also increase. By calculating the Mandel
Q parameter, we also observed that the Schrödinger cat state which shown Poisson distribution tended to appear sub-Poisson distribution.