Comparative analysis of properties for amplified coherent state and amplified squeezed vacuum

Autor:	Z. S. Wang, Xue-Xiang Xu, Sheng-Guo Guan, Yan-Bei Cheng
Rok vydání:	2020
Předmět:	010309 optics Physics Quantum state Quantum mechanics Operator (physics) 0103 physical sciences Wigner distribution function Coherent states Statistical and Nonlinear Physics Quantum Physics 010306 general physics Condensed Matter Physics 01 natural sciences
Zdroj:	Modern Physics Letters B. 34:2050377
ISSN:	1793-6640 0217-9849
DOI:	10.1142/s0217984920503777
Popis:	Two “amplified” quantum states, that is, amplified coherent state (ACS) and amplified squeezed vacuum (ASV), are considered in this paper by applying operator [Formula: see text] on coherent state (CS) and squeezed vacuum (SV), respectively. Here [Formula: see text] [Formula: see text] denotes a amplification factor and [Formula: see text]) denote the creation (annihilation) operator. Along these two lines, we make a comparative analysis of properties for ACS and ASV. The considered properties include density matrix elements, Wigner function, mean photon number, second-order autocorrelation function, and quadrature squeezing. We derive analytical expressions and make numerical simulations for all the properties. The noteworthy results include: (1) the ACS has antibunching and squeezing characters; (2) the ASV will have the bunching and antibunching effect in small initial squeezing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a98d60c8a5e19d3ae5787de98006644 https://doi.org/10.1142/s0217984920503777 Zobrazit plný text záznamu