Thermal entanglement of the mixed spin-1/2 and spin-5/2 Heisenberg model under an external magnetic field

Thermal entanglement of the mixed spin-1/2 and spin-5/2 Heisenberg model under an external... We use the concept of negativity to study the entanglement of spin-1/2 and spin-5/2 antiferromagnetic Heisenberg model with an inhomogeneous magnetic field. Analytical conclusions of the model are acquired. It is found that the critical temperature $$T_\mathrm{c}$$ T c goes up, as the increase of anisotropy parameter $$k$$ k . The temperature $$T_\mathrm{c}$$ T c becomes bigger than the results of spin-1/2 and spin-3/2 Heisenberg XXZ chain for the same value of $$k$$ k . And we can gain more entanglement at higher temperature by coordinating the value of inhomogeneity $$b$$ b . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Thermal entanglement of the mixed spin-1/2 and spin-5/2 Heisenberg model under an external magnetic field

, Volume 13 (7) – Mar 18, 2014
11 pages

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-014-0745-7
Publisher site
See Article on Publisher Site

Abstract

We use the concept of negativity to study the entanglement of spin-1/2 and spin-5/2 antiferromagnetic Heisenberg model with an inhomogeneous magnetic field. Analytical conclusions of the model are acquired. It is found that the critical temperature $$T_\mathrm{c}$$ T c goes up, as the increase of anisotropy parameter $$k$$ k . The temperature $$T_\mathrm{c}$$ T c becomes bigger than the results of spin-1/2 and spin-3/2 Heisenberg XXZ chain for the same value of $$k$$ k . And we can gain more entanglement at higher temperature by coordinating the value of inhomogeneity $$b$$ b .

Journal

Quantum Information ProcessingSpringer Journals

Published: Mar 18, 2014

References

• Quantum information and computation
Bennett, CH; Divincenzo, DP
• Quantum computation with quantum dots
Loss, D; Divincenzo, DP
• Entangled rings
Oconnor, KM; Wootters, WK

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