Specific heat and thermal entanglement in an open quantum system

Lari, Behzad; Hassanabadi, H.

doi:10.1142/s0217732319500597

Cited by 3 publications

(1 citation statement)

References 32 publications

(11 reference statements)

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“…This implies that the present W-Class tetrapartite system is more robust than that of the GHZ tetrapartite system since r W−Class ≈ 0.472473 > r GHZ ≈ 0.417. Finally, it should be mentioned that we are going to see whether or how the present study extends to the thermodynamic properties as treated in [64,65].…”

Section: Discussion and Concluding Remarksmentioning

confidence: 95%

Tetrapartite entanglement features of W-Class state in uniform acceleration

2019

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Using the single-mode approximation, we first calculate entanglement measures such as negativity (1 − 3 and 1 − 1 tangles) and von Neumann entropy for a tetrapartite W-Class system in noninertial frame and then analyze the whole entanglement measures, the residual π4 and geometric Π4 average of tangles. Notice that the difference between π4 and Π4 is very small or disappears with the increasing accelerated observers. The entanglement properties are compared among the different cases from one accelerated observer to four accelerated observers. The results show that there still exists entanglement for the complete system even when acceleration r tends to infinity. The degree of entanglement is disappeared for the 1 − 1 tangle case when the acceleration r > 0.472473. We reexamine the Unruh effect in noninertial frames. It is shown that the entanglement system in which only one qubit is accelerated is more robust than those entangled systems in which two or three or four qubits are accelerated. It is also found that the von Neumann entropy S of the total system always increases with the increasing accelerated observers, but the S κξ and S κζδ with two and three involved noninertial qubits first increases and then decreases with the acceleration parameter r, but they are equal to constants 1 and 0.811278 respectively for zero involved noninertial qubit.

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Section: Discussion and Concluding Remarksmentioning

confidence: 95%

Tetrapartite entanglement features of W-Class state in uniform acceleration

2019

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Thermal signature of a helical molecule: Beyond nearest-neighbor electron hopping

Sarkar,

Maiti,

Laroze

2024

Phys. Rev. B

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Open quantum systems and thermal non-equilibrium processes

Rahdar

Lari

2020

Mod. Phys. Lett. B

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In this paper, we investigate the effects of convexity and concavity of states on entanglement of the system under thermal non-equilibrium condition. In this regard, we consider a system consisting of two spin 1/2 particles with Dzyaloshinskii–Moriya (DM) interaction that follows the Tsallis statistics.Also, according to the desired statistics, the effect of environment parameters and the convexity or concavity of the input states on the output behavior of the SWAP gate is obtained.

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Specific heat and thermal entanglement in an open quantum system

Cited by 3 publications

References 32 publications

Tetrapartite entanglement features of W-Class state in uniform acceleration

Tetrapartite entanglement features of W-Class state in uniform acceleration

Thermal signature of a helical molecule: Beyond nearest-neighbor electron hopping

Open quantum systems and thermal non-equilibrium processes

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