Nonclassical photon statistics and bipartite entanglement generation of excited coherent states

We have studied the effect of a beam splitter on the excited coherent states, which are an intermediate state between the fock state and the coherent state. These states are obtained due to successive elementary one-photon excitations of a coherent state. We have used linear entropy to measure the entanglement generated through a beam splitter when a single-mode excited coherent state is injected at each input port of the beam splitter. We have used our very generalized results to study the possible generation of entanglement for few more specific cases also. Furthermore, we have also studied the nonclassical photon statistics of the output field through the Mandel’s Q parameter and have found the correlation between the photon statistics and the entanglement of the output state.

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