Comparison of qubit and qutrit like entangled squeezed and coherent states of light

OPTICS COMMUNICATIONS

卷:377

Article

Najarbashi, G.¹  Mirzaei, S.¹ 

[1] Univ Mohaghegh Ardabili, Dept Phys, POB 179, Ardebil, Iran

关键词: Squeezed state;    Coherent state;    Entanglement;    Wigner function;   

DOI  :  10.1016/j.optcom.2016.04.068

来源: Elsevier

【 摘 要 】

Squeezed state of light is one of the important subjects in quantum optics which is generated by optical nonlinear interactions. In this paper, we especially focus on qubit like entangled squeezed states (ESS's) generated by beam splitters, phase-shifter and cross Kerr nonlinearity. Moreover the Wigner function of two-mode qubit and qutrit like ESS are investigated. We will show that the distances of peaks of Wigner functions for two-mode ESS are entanglement sensitive and can be a witness for entanglement. Like the qubit cases, monogamy inequality is fulfilled for qutrit like ESS. These trends are compared with those obtained for qubit and qutrit like entangled coherent states (ECS). (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free