Stochastic resonance in Gaussian quantum channels

摘要: We determine conditions for the presence of stochastic resonance in a lossy bosonic channel with nonlinear, threshold decoding. The effect occurs if and only detection is outside "forbidden interval". show that it takes place different settings: when transmitting classical messages through channel, over an entanglement-assisted discriminating channels loss parameters. Moreover, we consider setting which transmission qubit particular encoding In all cases, assume addition Gaussian noise to signal does not matter who, between sender receiver, introduces such noise. Remarkably, results are obtained considering private communication. this case symmetry receiver broken interval" may vanish, leading occurrence effects any value threshold.