Natural Thermal and Magnetic Entanglement in the 1D Heisenberg Model

M. C. Arnesen; S. Bose; V. Vedral

doi:10.1103/PhysRevLett.87.017901

Natural Thermal and Magnetic Entanglement in the 1D Heisenberg Model

M. C. Arnesen, S. Bose, and V. Vedral

Phys. Rev. Lett. 87, 017901 – Published 14 June 2001

Abstract

We investigate the entanglement between any two spins in a one dimensional Heisenberg chain as a function of temperature and the external magnetic field. We find that the entanglement in an antiferromagnetic chain can be increased by increasing the temperature or the external field. Increasing the field can also create entanglement between otherwise disentangled spins. This entanglement can be confirmed by testing Bell’s inequalities involving any two spins in the solid.

Received 26 November 2000

DOI:https://doi.org/10.1103/PhysRevLett.87.017901

Authors & Affiliations

M. C. Arnesen¹, S. Bose¹, and V. Vedral^1,2

¹Centre for Quantum Computation, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
²Optics Section, Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom