Thermal Entanglement in Ferrimagnetic Chains

Abstract

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?"

4 pages, 3 figures

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• Unconventional strengthening of a bipartite entanglement of a mixed spin-(1/2,1) Heisenberg dimer achieved through Zeeman splitting
• Entanglement in a Quantum Mixed-Spin Chain
• Entanglement and magnetic order
• Thermal entanglement in fully connected spin systems and its RPA description
• Entanglement evolution in multipartite cavity-reservoir systems under local unitary operations
• Entanglement evolution of three-qubit mixed states in multipartite cavity-reservoir systems
• Quantum correlations versus spin magnitude: Transition to the classical limit
• Thermal entanglement in $2\otimes 3$ Heisenberg chains via distance between states