Coherent state(also called Glauber state) refer to a special kind of pure quantum-mechanical state of the light field corresponding to a single resonator mode which describe closest quantum state to a classical sinusoidal wave such as a continuous laser wave. In this paper we manipulate entangled two mode coherent states using beam splitter(BS) and Kerr medium and then evaluate the amount of entanglement by concurrence measure. We show that it is possible to construct maximal entangled state by transmitting a laser from a (BS) and Kerr medium.

Keywords: Coherent state, Entanglement, Beam splitter, Concurrence

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