Quantifying decoherence effect of photon-modulated squeezed vacuum states

Abstract

In this paper, we theoretically put forward the photon-modulated squeezed vacuum states (PMSVS) by applying photon-modulated operator on squeezed vacuum states. Starting from the normally ordered density operator as well as the technique of integration within an ordered product of operators, the normalization constant is obtained, which is related to the Legendre polynomials. In addition, by deriving the normally ordered density operator and Wigner function of PMSVS in laser channel and thermal channel, the decoherence process is discussed, respectively. The investigations may provide experimentalists with some better references in quantum control and building optimal strategies to suppress decoherence.