Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Mohamed, Abdel‐Baset A.; Eleuch, Hichem

doi:10.1038/s41598-020-70209-5

Cited by 20 publications

(4 citation statements)

References 56 publications

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“…On the other hand, the atomic Q-Husimi function can quantify the evolution of quantum entanglement by the Wehrl entropy, it is formalized as [42,43],…”

Section: Q-husimi Functionmentioning

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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“…On the other hand, the atomic Q-Husimi function can quantify the evolution of quantum entanglement by the Wehrl entropy, it is formalized as [42,43],…”

Section: Q-husimi Functionmentioning

confidence: 99%

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

2021

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“…Previously many studies focused on measuring and characterizing quantum resources in the framework of intrinsic and standard decoherence models in different quantum systems [11][12][13][14][15][16][17][18][19][20][21][22][23]. Although many methods were introduced to measure quantum systems, assessing the quantumness of multipartite systems is still a challenging task [8,24].…”

Section: Introductionmentioning

confidence: 99%

Intrinsic decoherence effects on correlated coherence and quantum discord in XXZ Heisenberg model

Dahbi¹,

Oumennana²,

Mansour³

2022

Preprint

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Spin qubits are at the heart of technological advances in quantum processors and offer an excellent framework for quantum information processing. This work characterizes the time evolution of coherence and nonclassical correlations in a two-spin XXZ Heisenberg model, from which a two-qubit system is realized. We study the effects of intrinsic decoherence on coherence (correlated coherence) and nonclassical correlations (quantum discord ), taking into consideration the combined impact of an external magnetic field, Dzyaloshinsky-Moriya (DM) and Kaplan Shekhtman Entin-Wohlman-Aharony (KSEA) interactions. To fully understand the effects of intrinsic decoherence, we suppose that the system can be prepared in one of the two well-known extended Werner-like (EWL) states. The findings show that intrinsic decoherence leads the coherence and quantum correlations to decay and that the behavior of the aforementioned quantum resources relies strongly on the initial EWL state parameters. We, likewise, found that the two-spin correlated coherence and quantum discord; become more robust against intrinsic decoherence depending on the type of the initial state. These outcomes shed light on how a quantum system should be engineered to achieve quantum advantages.

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“…Wehrl entropy was used to quantify the intermode correlation that can be referred to as entanglement in a phase space [11]. Nonclassical effects of the Q-distribution in one-and two-qubit systems interacting with different cavity fields are investigated [12]. While the Q-distribution information in three-level atomic (qutrit) systems is studied [13] with cavity damping, and stills need to be investigated with the decoherence models, as in the presented investigation.…”

Section: Introductionmentioning

confidence: 99%

Non-classicality in an open two-mode parametric amplifier cavity containing a Λ-qutrit system

Mohamed¹,

Hessian²

2021

Phys. Scr.

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In the presented paper, we introduce an analytical description for a dissipative two-mode parametric amplifier coherent cavity containing a three-level system (qutrit). Based on normalized correlation function, Q-function and its associated Wehrl entropy, the dynamics of the quantum phenomena: two-mode cavity non-classically, qutrit phase space information, and quantum coherence are investigated under the physical parameters: qutrit-cavity interactions, initial coherent intensity, and the dissipation. It is found that the generated quantum phenomena, due to the qutrit-cavity interaction, depend on the physical parameters of the initial states and the dissipation. The robustness of the quantum phenomena against the dissipation can be enhanced by decreasing the initial coherent intensity cavity. The stability and strength of the generated bunching/anti-bunching behaviour can be controlled by the cavity dissipation.

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Quasi-probability information in a coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence

Cited by 20 publications

References 56 publications

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

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

Intrinsic decoherence effects on correlated coherence and quantum discord in XXZ Heisenberg model

Non-classicality in an open two-mode parametric amplifier cavity containing a Λ-qutrit system

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