Wehrl information and mixedness of a Cooper-pair box coupled to a cavity in a thermal reservoir

Mohamed, Abdel‐Baset A.; Eleuch, Hichem

doi:10.3938/jkps.68.513

Cited by 3 publications

(1 citation statement)

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“…For a single-mode atom-field interaction, the Q-Husimi function and Wehrl entropy are used as an indicator of the quantum phase space [13]. Moreover, the Wehrl entropy used as good measure for entanglement generation due to atom-field interactions [14,15,16]. The Q-Husimi function and Wehrl entropy can be applied in finding the intermode correlations in phase space [17,18].…”

Section: Introductionmentioning

confidence: 99%

Nonclassical atomic system dynamics time-dependently interacts with finite entangled pair coherent parametric converter cavity fields

2021

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We consider a time-dependent model that describes a qubit timedependently interacts with a cavity containing finite entangled pair coherent parametric converter fields. The dynamics of some quantum phenomena, as: phase space information, quantum entanglement and squeezing, are explored by atomic Husimi function, atomic Wehrl entropy, variance, and entropy squeezing. The influences of the unitary qubit-cavity interaction, the difference between the two-mode photon numbers, the initial atomic coherence, and the time-dependent qubit location are investigated. It is found that the regularity, the amplitudes and the frequency of the quantum phenomena can be controlled by the physical parameters. For the initial atomic pure state, the qubit-cavity entanglement, the qubit phase space information, and atomic squeezing can be generated strongly compared to those of the initial atomic mixed state. The time-dependent location parameters enhance the generated quantum phenomena, and its effect can be enhanced by the parameters of the two-mode photon numbers and the initial atomic coherence.

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