Decoherence and relative phase sensitivity of entangled coherent states

we demonstrate that entanglement and nonclassical properties of entangled coherent states are sensitive to relative phase and more robust against channel decoherence for small values of average photon number. We have analyzed the decoherence due to channel losses and considered two cases: asymmetric and symmetric noise channel. Moreover, we have observed a correlation between entanglement and nonclassical features and found that one of the entangled coherent states is more robust against photon absorption.