مشخصات پژوهش

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, A† = f(ˆn)a†, on each mode of the entangled coherent states (ECSs), |±(). By choosing a particular deformation function f(ˆn), 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 a† 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.