Entanglement and correlation in anisotropic quantum spin systems

Preprint

20 May 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/0305108

Abstract

Analytical expressions for the entanglement measures concurrence, i-concurrence and 3-tangle in terms of spin correlation functions are derived using general symmetries of the quantum spin system. These relations are exploited for the one-dimensional XXZ-model, in particular the concurrence and the critical temperature for disentanglement are calculated for finite systems with up to six qubits. A recent NMR quantum error correction experiment is analyzed within the framework of the proposed theoretical approach.

Keywords

ENTANGLEMENT MEASURES
MEASURES CONCURRENCE
QUANTUM SPIN SYSTEM
ANISOTROPIC QUANTUM
SYSTEMS ANALYTICAL
ERROR CORRECTION
SPIN SYSTEM

All Related Versions

Version 1, 2003-05-20, ArXiv
Published version: Physical Review A, 68 (3).

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