2015/01/31 by Farnaz Farman, Alireza Bahrampour
Computer Science · Physics and Astronomy · #Amplitude #Coherence (philosophical gambling strategy) #Computer science #Laser #Mechanical and Optical Resonators #Neural Networks and Reservoir Computing #Noise (video) #Optics #Phase noise #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum noise #Shot noise #quant-ph
paper · pdf · doi:10.1103/physreva.91.033828
arxiv created 2015/03/15 · openalex publication_date 2015/03/23 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Optomechanical and electromechanical cavities have been widely used in quantum memories and quantum transducers. We theoretically investigate the robustness of optomechanical and electromechanical quantum memories against the noise of the control laser. By solving the Langevin equations and using the covariance matrix formalism in the presence of laser noise, the storing fidelity of Gaussian states is obtained. It is shown that the destructive effect of phase noise is more significant in higher values of coupling laser amplitude and optomechanical coupling strength G. However, by further increasing the coupling coefficient, the interaction time between photons and phonons decreases below the coherence time of laser frequency noise and the destructive effect of laser phase noise on the storing fidelity drops as well.