QUANTUM PHASE TRANSITIONS AND ENTANGLEMENT INJ1–J2MODEL

Recep Eryiğit, Resul Eryiğit and Yiğit Gündüç ()
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Recep Eryiğit: Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey
Resul Eryiğit: Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey;
Yiğit Gündüç: Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey

International Journal of Modern Physics C (IJMPC), 2004, vol. 15, issue 08, 1095-1103

Abstract: We study ground state pairwise entanglement within one-dimensional spin-1/2 antiferromagneticJ1–J2model with competing interactions. Contrary to some claims we found that frustration does not increase entanglement. Concurrence of nearest and next nearest neighbors are found to show abrupt change at phase transition points. We also show that the concurrence can be used to classify the phase diagram of the model in anisotropy–frustration plane.

Keywords: Quantum computing; entanglement; concurrence; J1–J2model (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1142/S0129183104006558

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