Thermal Entanglement in Ferrimagnetic Chains

Details Thermal Entanglement in Ferrimagnetic Chains Thermal Entanglement in Ferrimagnetic Chains

2006-04-13

arxiv.org/abs/quant-ph/0604099v1

Phys. Rev. A73, 064302(2006)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.73.064302

A formula to evaluate the entanglement in an one-dimensional ferrimagnetic system is derived. Based on the formula, we find that the thermal entanglement in a small size spin-1/2 and spin-s ferrimagnetic chain is rather robust against temperature, and the threshold temperature may be arbitrarily high when s is sufficiently large. This intriguing result answers unambiguously a fundamental question: ``can entanglement and quantum behavior in physical systems survive at arbitrary high temperatures?"

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