Nonclassicality of photon-modulated atomic coherent states in the Schwinger bosonic realization

doi:10.1088/1674-1056/abb3e8

Abstract We theoretically introduce two new photon-modulated atomic coherent states (ACSs) via using the Schwinger bosonic representation of the angular momentum operators (the sequential operations Jⁿ) on an ACS, and investigate their nonclassicality using the Wigner distribution, photon number distribution, and entanglement entropy. It is found that photon-modulated ACSs possess more stronger nonclassicality than the original ACS in certain regions of τ , the nonclassicality enhances with increasing number n of the operations J and the operation J_+(-)ⁿ enhances the entanglement in the region of small (large) τ .

Keywords: photon-modulated atomic coherent state nonclassicality Wigner distribution entanglement

Received: 03 July 2020
Revised: 01 January 1900
Accepted manuscript online: 01 September 2020

PACS:	42.50.-p	(Quantum optics)
	03.65.-w	(Quantum mechanics)
	05.30.-d	(Quantum statistical mechanics)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11347026) and the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2016AM03 and ZR2017MA011).

Corresponding Authors: ^†Corresponding author. E-mail: jswang@qfnu.edu.cn ^‡Corresponding author. E-mail: mengxiangguo1978@sina.com

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Jisuo Wang(王继锁), Xiangguo Meng(孟祥国), and Xiaoyan Zhang(张晓燕) Nonclassicality of photon-modulated atomic coherent states in the Schwinger bosonic realization 2020 Chin. Phys. B 29 124213

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