Entanglement and correlation in anisotropic quantum spin systems
量子物理
2009-11-10 v1
摘要
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.
引用
@article{arxiv.quant-ph/0305108,
title = {Entanglement and correlation in anisotropic quantum spin systems},
author = {Ulrich Glaser and Helmut Büttner and Holger Fehske},
journal= {arXiv preprint arXiv:quant-ph/0305108},
year = {2009}
}
备注
8 pages, 3 figures