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

TL;DR

This paper investigates the mean parity of various single-photon excited optical states in thermal environments, highlighting their nonclassical features and similarities, especially through the negativity of mean parity as an indicator.

Contribution

It provides a detailed analysis of the mean parity behavior of excited optical states in thermal channels, revealing their nonclassical properties and similarities.

Findings

Single-photon excited binomial and coherent states show similar mean parity behavior.

Negative mean parity indicates nonclassicality of excited thermal states.

Mean parity can serve as a nonclassicality indicator 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.