Mean parity of single quantum excitation of some optical fields in thermal environments

Abstract

The mean parity (the Wigner function at the origin) of excited binomial states, excited coherent states and excited thermal states in thermal channel is investigated in details. It is found that the single-photon excited binomial state and the single-photon excited coherent state exhibit certain similarity in the aspect of their mean parity in the thermal channel. We show the negative mean parity can be regarded as an indicator of nonclassicality of single-photon excitation of optical fields with a little coherence, especially for the single-photon excited thermal states.

4 pages, 4 figures, RevTex4; PACS numbers: 42.50.Dv, 03.65.Yz, 05.40.Ca; Three typo errors have been corrected

References in corpus (4)

• Single-Shot Generation and Detection of a Two-Photon Generalized Binomial State in a Cavity
• Nonclassicality of quantum excitation of classical coherent field in photon loss channel
• Nonclassicality of quantum excitation of classical coherent fields in thermal environments
• Nonclassicality of single quantum excitation of a thermal field in thermal environments