Enhancement of nonclassicality by frequency modulation in a nanomechanical system

The influence of the frequency modulation on the nonclassicality is explored in a system of nanomechanical resonator, which is a promising device in the fields of quantum information engineering. It is shown that the nonclassicality of the quantum state is dependent on the value of the modulation ra...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-03, Vol.1176 (5), p.52072
Main Authors: Zhang, Shi-Hui, Wang, Qing-Wu
Format: Article
Language:English
Subjects:
Distribution functions
Energy levels
Frequency modulation
Information engineering
Quantum phenomena
Wigner distribution
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Summary:The influence of the frequency modulation on the nonclassicality is explored in a system of nanomechanical resonator, which is a promising device in the fields of quantum information engineering. It is shown that the nonclassicality of the quantum state is dependent on the value of the modulation rate during the quantum evolution. A pronounced peak is observed in the curve of the nonclassicality versus the modulation rate. It indicates that the system's nonclassicality can be enhanced by the modulation rate. The enhancement of the nonclassicality by the modulation rate is induced by the effects of the external driving source on the quantum interference between different energy levels. This is supported by the correspondences between the dependence curves of the nonclassicality indicator and the uncertainty of the Wigner distribution function on the modulation rate.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1176/5/052072