Quantum Decoherence of Charge Qubit Coupled to Nonlinear Nanomechanical Resonator |
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Authors: | CHEN Cheng GAO Yi-Bo |
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Institution: | College of Applied Sciences, Beijing University of Technology, Beijing 100124, China |
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Abstract: | When the nonlinearity of nanomechanical resonator is not negligible, the quantum decoherence of charge qubit is studied analytically. Using nonlinear Jaynes-Cummings model, one explores the possibility of being quantum data bus for nonlinear nanomechanical resonator, the nonlinearity destroys the dynamical quantum information-storage and maintains the revival of quantum coherence of charge qubit. With the calculation of decoherence factor, we demonstrate the influence of the nonlinearity of nanomechanical resonator on engineered decoherence of charge qubit. |
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Keywords: | quantum decoherence charge qubit nonlinear nanomechanical resonator cavity QED |
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