Eur. Phys. J. Plus (2019) 134: 456
https://doi.org/10.1140/epjp/i2019-12823-7

Regular Article

Enhancing entanglement of entangled coherent states via a f-deformed photon-addition operation

¹ Department of Physics, Azarbaijan Shahid Madani University, P.O.Box 51745-406, Tabriz, Iran
² Department of Physics, Payame Noor University, P.O.Box 19395-3697, Tehran, Iran

^* e-mail: bmojaveri@azaruniv.ac.ir

Received: 24 February 2019
Accepted: 13 June 2019
Published online: 20 September 2019

Abstract

In this paper, we introduce a new kind of photon-added entangled coherent states (PA-ECSs), by performing repeatedly a f-deformed photon-addition (DPA) operation, , on each mode of the entangled coherent states (ECSs), . By choosing a particular deformation function , we study how the entanglement properties can be enhanced by DPA operation. As a result, we show that both the single and two-mode DPA operation can be used to improve the entanglement of , where the effects of improvement by two-mode DPA operation are more prominent than those by single-mode DPA operation, in any amplitude regime. Moreover, our results show there exists a family of coherent amplitudes such that the two-mode DPA operation preserves the maximal entanglement of the odd ECSs , where the non-deformed photon-addition operation suppresses the entanglement amount. Finally, a theoretical scheme for the physical generation of the introduced states based on a Jaynes-Cummings model with intensity-dependent couplings is proposed.