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Chinese Journal of Quantum Electronics

Squeezing effects of the mesoscopic LC circuit

Yinghua Ji

Published Jan 1, 2005• 0 citations
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Abstract

According to the fact that a mesoscopic capacitor can be regarded as a mesoscopic junction, we restudied the quantum effects of the mesoscopic LC circuit. The study shows: considering the coupling effects of the mesoscopic capacitor, the mesoscopic LC circuit will evolve from the vacuum state to a squeezing vacuum state. We also research the quantum fluctations of the squeezing vacuum state.

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According to the fact that a mesoscopic capacitor can be regarded as a mesoscopic junction, we restudied the quantum effects of the mesoscopic LC circuit. The study shows: considering the coupling effects of the mesoscopic capacitor, the mesoscopic LC circuit will evolve from the vacuum state to a squeezing vacuum state. We also research the quantum fluctations of the squeezing vacuum state.
This paper studied the time evolution of quantum state in a mesoscopic LC circuit with the coupling energy caused by mesoscopic capacitor acting as a tunnel junction. It indicates that the state of the junction evolves into the quantum superposition of two coherent states and, in the state, nonclassical squeezing properties of the circuit appear. It also indicates that the dynamic behavior of the current shows collapse and revival phenomenon. The research in the paper will be helpful to miniaturize integrate circuits and electric components. It will be also important for the utilization of mesoscopic circuits to evolve the quantum states, which work as information carriers.