Thermal Quantum Discord and Super Quantum Discord Teleportation Via a Two-Qubit Spin-Squeezing Model

Ahadpour, Sodeif; Мирмасоуди, Фороузан

doi:10.1134/s004057791804013x

Cited by 8 publications

(2 citation statements)

References 40 publications

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“…Up to now, various systems have been studied in the field of quantum processes. The spin chains have been considered as one of the most suitable candidates for the study of entanglement and quantum correlations [11,12]. Recently, the cavity quantum electrodynamics system (CQES) has received much attention since this system offer an ideal coupling between atoms and photons [13].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of super quantum discord and optimal dense coding in quantum channels

Мирмасоуди¹,

Ahadpour²

2018

J. Phys. A: Math. Theor.

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Quantum discord (QD), super quantum discord (SQD) and optimal dense coding at entangled states of three types of quantum channels, are investigated. The used models include: two-qubit spin squeezing, the two-qubit Heisenberg XYZ model with decoherency and the Jaynes–Cummings model. In the first two models the quantum correlations and the optimal dense coding capacity are calculated in terms of channel parameters, system initial conditions and decoherency rate. It has been found that valid dense coding can exist, although there is no trace of entanglement in the quantum channel. In contrast, despite the presence of entanglement states in the system, there may be no dense coding capacity. We investigate the effects of cavity Fock states on quantum correlations and optimal dense coding in the Jaynes–Cummings model. Cavity Fock states are found to be effective for quantum correlations and optimal dense coding. The common result of all three models is that the dynamic properties of SQD on our channel enable us to determine when and under what conditions the system is suitable for dense coding capacity.

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Section: Introductionmentioning

confidence: 99%

Dynamics of super quantum discord and optimal dense coding in quantum channels

Мирмасоуди¹,

Ahadpour²

2018

J. Phys. A: Math. Theor.

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“…One of the important kinds of QCs was the quantum entanglement. Entanglement played a main role in quantum information and computation, [1][2][3][4][5][6][7] quantum state teleportation, [8] and quantum cryptography. [9] Entanglement was observed for some theoretical works [10] and experimental researches.…”

Section: Introductionmentioning

confidence: 99%

Some studies of the interaction between two two-level atoms and SU (1, 1) quantum systems

El-Shahat

Ismail

2018

Chinese Phys. B

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Herein, we present an approach to look for the best phenomenon to measure quantum correlation. The system of two isolated qubits each interacting with a single-mode cavity was theoretically created to study the quantum correlation. Some of the phenomena, such as the quantum discord and concurrence, were generated through such a system. The influences of initial state purity, qubit motion, and detuning parameters were discussed for the phenomena. These parameters for a specific value show that the behavior of phenomena are analogous. It is interesting to mention that some values of detuning undergo a sudden death of phenomena, and the quantum discord still captures the qubits quantum correlation. We predict that the quantum discord may be a better measure of quantum correlation than concurrence.

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Thermodynamic cost of quantum transfers

Ahadpour

Мирмасоуди

2022

Appl. Phys. B

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In this work, we will study thermodynamic cost of dense coding. In this regard, a scheme is proposed for quantum channel where is induced from two initially uncorrelated thermal quantum systems. At first, the quantum Fisher information and spin squeezing is used to quantify the correlation dynamics over the system. The system reveals that the dynamics of quantum correlations depends crucially on specific energy and temperature. Also, they can be utilized as control parameters for optimal dense coding. Several interesting features of the variations of the energy cost and the dense coding capacity are obtained. It can keep its own valid capacity value in a broad range of temperature by increasing in the energy value of excited states. Also, we can identify valid dense coding with the help of calculating energy cost in the system. Using this approach, identifying a critical point of this model in dense coding capacity quality can be very effective.

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Thermal Quantum Discord and Super Quantum Discord Teleportation Via a Two-Qubit Spin-Squeezing Model

Cited by 8 publications

References 40 publications

Dynamics of super quantum discord and optimal dense coding in quantum channels

Dynamics of super quantum discord and optimal dense coding in quantum channels

Some studies of the interaction between two two-level atoms and SU (1, 1) quantum systems

Thermodynamic cost of quantum transfers

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