Controlling the nonclassical properties of a hybrid Cooper pair box system and an intensity dependent nanomechanical resonator

Abstract

We employ a more realistic treatment to investigate the entropy and the excitation-inversion of a coupled system that consists of a nanomechanical resonator and a superconducting Cooper pair box. The procedure uses the Buck-Sukumar model in the microwave domain, considers the nanoresonator with a time dependent frequency and both subsystems in the presence of losses. Interesting results were found for the temporal evolutions of the entropy of each subsystem and of the excitation-inversion in the Cooper pair box. A comparison was also performed about which of these two subsystems is more sensitive to the presence of losses. The results suggest that appropriate choices of the involved time dependent parameters allow us to monitor these two features of the subsystems and may offer potential applications, e.g., in the generation of nonclassical states, quantum communication, quantum lithography.

8 pages, 15 figures

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Cited by in corpus (3)

• Controlling properties of a hybrid Cooper pair box interacting with a nanomechanical resonator in the presence of Kerr nonlinearities and losses
• Dispersive Jaynes-Cummings Hamiltonian describing a two-level atom interacting with a two-level single mode field
• On the paradoxical evolution of the number of photons in a new model of interpolating Hamiltonians