Robustness of Entangled Squeezed States Versus Entangled Coherent States Against Channel Decoherence Effect

We compare theoretically the effects of channel decoherence on entangled coherent states (ECSs) and entangled squeezed states (ESSs) as non-orthogonal states. The comparison is achieved in the case when the interaction with the noisy environment is symmetric and when it is asymmetric. In the first case, we notice a robustness of ECSs compared with ESSs against the photons losses. This robustness increases with a good way after using a higher amplitudes. However, in the asymmetric decoherence case, the ESSs resist more the photon losses compared with the ECSs.