Entanglement of multiphoton supercoherent states

Erik Díaz-Bautista, David J. Fernández C.

Amin Motamedinasab

Amin Motamedinasab, Davood Afshar, Mojtaba Jafarpour

Ravitej Uppu

امین معتمدی نسب, داود افشار

Two photon supercoherent states are the eigenstates of square of the supersymmetric annihilation operator In this paper we investigate the entanglement of two classes of these states To this end orthogonal and normalized bosonic bases are introduced and supercoherent states would be transformed to the twoqubit ones with the use of them It is observed that twophoton supercoherent states are entangled and their entanglement depends on the coherency parameter unlike the onephoton supercoherent states The entanglement behavior of these two classes of states are different for large values of the coherency parameter However the maximum of fluctuation of entanglement occurs for both of these two classes in small values of coherency parameter

Davood Afshar, Amin Motamedinasab, Azam Anbaraki +1 more

In this paper, we have constructed even and odd superpositions of supercoherent states, similar to the standard even and odd coherent states of the harmonic oscillator. Then, their nonclassical properties, that is, squeezing and entanglement have been studied. We have observed that even supercoherent states show squeezing behavior for some values of parameters involved, while odd supercoherent states do not show squeezing at all. Also sub-Poissonian statistics have been observed for some ranges of the parameters in both states. We have also shown that these states may be considered as logical qubits which reduce to the Bell states at a limit, with concurrence equal to 1.