Open AccessWigner functions of multiple-photon excited coherent states
Author(s) -
Lan Hai-jiang,
Pang Hua-feng,
L. F. Wei
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.8281
Subject(s) - excited state , physics , fock space , coherent states , wigner distribution function , phase space , boson , quantum mechanics , photon , inverse , space (punctuation) , atomic physics , quantum , mathematics , linguistics , philosophy , geometry
Wigner functions in phase space are reconstructed for the excited coherent stateswhich are generated by applying the inverse of k-Boson operators repeatedly to the coherent states. The non-classicality of these states is discussed by calculating their Wigner functions in Fock-state space. Numerical results show that these excited coherent states always reveal non-classical characteristicsno matter whether the excited number k is even or oddand also the corresponding non-classicality is more obvious with the number k increasing.