Linear-Optical Teleportation of Bipartite Entangled Coherent States via Maximally Entangled Coherent Channels

This paper outlines a linear-optical protocol for the teleportation of bipartite entangled coherent states using maximally entangled coherent states as quantum channels. The scheme relies on symmetric beam splitters, phase shifters, photon-number-resolved measurements, and conditional local phase operations. Successful teleportation is achieved probabilistically with a constant success rate of 50%, independent of the coherentstate amplitude α, and governed by the parity of the measurement outcomes. The absence of nonlinear optical processes or direct photon interactions renders the protocol experimentally feasible and scalable, making it suitable for applications in continuous-variable quantum communication, quantum information processing, and coherent-state entanglement distribution.