Entanglement in alternating open spin-1/2 chains with XY-Hamiltonian

Abstract

We investigate entanglement of spin pairs in alternating open spin chains in the equilibrium state in an external magnetic field. We calculate the reduced density matrix of spin pairs and estimate the concurrence with Wootter's criteria. The obtained results demonstrate the dependence of the entanglement on the temperature, chain's length, the positions of the spins, and the ratio of the spin-spin interaction constants.

8 pages, 6 figures

References in corpus (9)

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• Mixed State Entanglement and Quantum Error Correction
• Entanglement in a simple quantum phase transition
• Perfect state transfer in quantum spin networks
• Entangled Rings
• Dynamics of Entanglement in One-Dimensional Spin Systems
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Cited by in corpus (7)

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• Multiple Quantum NMR and Entanglement Dynamics in Dipolar Coupling Spin
• Complete structural restoring of transferred multi-qubit quantum state
• Relationship between probabilities of the state transfers and entanglements in spin systems with simple geometrical configurations
• Entanglement of systems of dipolar coupled nuclear spins at the adiabatic demagnetization
• Entanglement and the Interplay between Staggered Fields and Couplings
• Super-quantum discord in ferromagnetic and antiferromagnetic materials