Effect of laser phase noise on the fidelity of optomechanical quantum memory
| Autor: | Alireza Bahrampour, F. Farman |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
Quantum Physics Coherence time Photon Relative intensity noise business.industry Quantum noise Cavity quantum electrodynamics FOS: Physical sciences Physics::Optics Laser Atomic and Molecular Physics and Optics law.invention Optics law Quantum mechanics Phase noise Quantum Physics (quant-ph) business Coupling coefficient of resonators |
| Zdroj: | Physical Review A. 91 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.91.033828 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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