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Optomechanical and electromechanical cavities have been widely used inquantum memories and quantum transducers. We theoretically investigate therobustness of opto(electro)-mechanical quan- tum memories against the noise ofthe control laser. By solving the Langevin equations and using the covariancematrix formalism in the presence of laser noise, the storing fidelity ofGaussian states is obtained. It is shown that, the destructive effect of phasenoise is more significant in higher values of coupling laser amplitude andoptomechanical coupling strength G. However, by further increasing couplingcoefficient, the interaction time between photons and phonons decreases belowthe coherence time of laser frequency noise and the destructive effect of laserphase noise on the storing fidelity drops as well.

Effect of laser phase noise on the fidelity of optomechanical quantum memory