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

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

2008-07-13

arxiv.org/abs/0807.2033v3

J. Phys. B 42, 055505 (2009)

Physics

Quantum Physics

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

Scientific paper

10.1088/0953-4075/42/5/055505

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.

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