Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model

In this paper, thermal entanglement in four and five-qubit spin-star networks evolved by an XXX Hamiltonian model is studied. We examine the effect of temperature, magnetic field and coupling constant on the concurrence. We will show that the entanglement is decreased by increasing the temperature a...

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Autores principales:	AZITA Naji, Mohsen Mollaei Zamani
Formato:	article
Lenguaje:	FA
Publicado:	Alzahra University 2021
Materias:	entanglement quantum teleportation fidelity spin star network thermal state Physics QC1-999
Acceso en línea:	https://doaj.org/article/87051cb0f82d41cfb52e8eaf7078ed58
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spelling	oai:doaj.org-article:87051cb0f82d41cfb52e8eaf7078ed582021-12-02T07:54:28ZResearch Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model2783-10432783-105110.22051/ijap.2021.36523.1226https://doaj.org/article/87051cb0f82d41cfb52e8eaf7078ed582021-09-01T00:00:00Zhttps://jap.alzahra.ac.ir/article_5915_d41d8cd98f00b204e9800998ecf8427e.pdfhttps://doaj.org/toc/2783-1043https://doaj.org/toc/2783-1051In this paper, thermal entanglement in four and five-qubit spin-star networks evolved by an XXX Hamiltonian model is studied. We examine the effect of temperature, magnetic field and coupling constant on the concurrence. We will show that the entanglement is decreased by increasing the temperature and the number of qubits. Also, we investigate quantum teleportation via a couple of spin-star networks in a thermal state. The average of fidelity as a function of temperature, magnetic field, and coupling constant is analyzed, too. It will be observed that as the temperature increases, the fidelity first decreases and then tends to a constant value. Moreover, with the increase of the external magnetic field, the average fidelity first increases and then gradually decreases, and in a certain amount of magnetic field, the average fidelity becomes zero. In addition, as the number of qubits increases, fidelity decreases with temperature. The results indicate that mean fidelity increases with increasing coupling constant.AZITA NajiMohsen Mollaei ZamaniAlzahra Universityarticleentanglementquantum teleportationfidelityspin star networkthermal statePhysicsQC1-999FAفیزیک کاربردی ایران, Vol 11, Iss 3, Pp 68-76 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	entanglement quantum teleportation fidelity spin star network thermal state Physics QC1-999
spellingShingle	entanglement quantum teleportation fidelity spin star network thermal state Physics QC1-999 AZITA Naji Mohsen Mollaei Zamani Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
description	In this paper, thermal entanglement in four and five-qubit spin-star networks evolved by an XXX Hamiltonian model is studied. We examine the effect of temperature, magnetic field and coupling constant on the concurrence. We will show that the entanglement is decreased by increasing the temperature and the number of qubits. Also, we investigate quantum teleportation via a couple of spin-star networks in a thermal state. The average of fidelity as a function of temperature, magnetic field, and coupling constant is analyzed, too. It will be observed that as the temperature increases, the fidelity first decreases and then tends to a constant value. Moreover, with the increase of the external magnetic field, the average fidelity first increases and then gradually decreases, and in a certain amount of magnetic field, the average fidelity becomes zero. In addition, as the number of qubits increases, fidelity decreases with temperature. The results indicate that mean fidelity increases with increasing coupling constant.
format	article
author	AZITA Naji Mohsen Mollaei Zamani
author_facet	AZITA Naji Mohsen Mollaei Zamani
author_sort	AZITA Naji
title	Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
title_short	Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
title_full	Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
title_fullStr	Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
title_full_unstemmed	Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model
title_sort	research paper: study of thermal entanglement and teleportation in spin-star networks in heisenberg xxx model
publisher	Alzahra University
publishDate	2021
url	https://doaj.org/article/87051cb0f82d41cfb52e8eaf7078ed58
work_keys_str_mv	AT azitanaji researchpaperstudyofthermalentanglementandteleportationinspinstarnetworksinheisenbergxxxmodel AT mohsenmollaeizamani researchpaperstudyofthermalentanglementandteleportationinspinstarnetworksinheisenbergxxxmodel
_version_	1718399112631549952

Research Paper: Study of Thermal Entanglement and Teleportation in Spin-star Networks in Heisenberg XXX Model

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