Comparison of quantum discord and relative entropy in some bipartite quantum systems

Mahdian, M.; Arjmandi, Mohammad B.

doi:10.1007/s11128-016-1245-8

Cited by 7 publications

(6 citation statements)

References 36 publications

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“…Entanglement, the most prominent correlation, has received a considerable attention and several methods have been made to measure it, specially in case of two-qubits [10,11]. Moreover, quantum discord, the second remarkable quantum concept, possesses a substantial value which is defined based on difference between classical and nonclassical correlations [12,13,14]. Also the other quantum correlations like deficit, dissonance, consonance and etc.…”

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confidence: 99%

An investigation of some quantum correlations of Dirac fields in noninertial frames

Arjmandi

2019

Can. J. Phys.

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In this paper, some concepts of quantum correlations, such as one-way quantum deficit, purity, and entanglement of formation are investigated between the modes of Dirac fields in noninertial frames. We consider two bipartite divisions of a tripartite system constructed by initial Werner states, which is shared between two relatively accelerated observers. The degradation of these quantum correlations is shown when the acceleration parameter increases. However, a nonzero amount of correlations survives even at infinite acceleration limit. Furthermore, we study the inevitable influence of mixedness factor of initial state on the quantum correlations behaviour. Finally, we review our calculation beyond single-mode approximation and point out some differences and similarities between the two regimes.

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confidence: 99%

An investigation of some quantum correlations of Dirac fields in noninertial frames

Arjmandi

2019

Can. J. Phys.

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“…Let us consider ρ BC to be the joint density matrix of battery and charger. Then mutual information is given by [42,43]…”

Section: B Correlationsmentioning

confidence: 99%

Performance of quantum batteries with correlated and uncorrelated chargers

Arjmandi¹,

Shokri²,

Faizi³

et al. 2022

Preprint

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Energy can be stored in some quantum batteries by electromagnetic fields as chargers. In this paper, the performance of a quantum battery with single and double chargers is studied. It is shown that by using two independent charging fields, prepared in coherent states, charging power of the quantum battery can be significantly improved, though the average number of embedded photons are kept the same in both scenarios. Then the results reveal that for the case of initially correlated states of the chargers the amount of extractable energy, measured by ergotropy, is more than initially uncorrelated ones. Finally, the behavior of generated quantum consonance between different cells of quantum battery and also the effect of generated battery-charger mutual information during the evolution are investigated and some qualitative relations between the generation of such correlations and the capability of energy storage in the quantum battery is demonstrated.

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“…It is important to mention that there are further measures that have been put forward in the last fifteen years or so. These include the ones that have been proposed [134,[178][179][180][181][182][183][184] based on Rényi and Tsallis entropies [185][186][187][188][189][190][191]. Further examples include Refs.…”

Section: Other Quantum Correlation Measuresmentioning

confidence: 99%