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Quantum Phase Transitions And Entanglement Inj1–J2model

Author

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  • RECEP ERYIĞIT

    (Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey)

  • RESUL ERYIĞIT

    (Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey;
    Department of Physics, Abant Izzet Baysal University, 14280 Bolu, Turkey)

  • YIĞIT GÜNDÜÇ

    (Physics Department, Hacettepe University, 06800 Beytepe, Ankara, Turkey)

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.

Suggested Citation

  • Recep Eryiğit & Resul Eryiğit & Yiğit Gündüç, 2004. "Quantum Phase Transitions And Entanglement Inj1–J2model," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 15(08), pages 1095-1103.
    • Handle: RePEc:wsi:ijmpcx:v:15:y:2004:i:08:n:s0129183104006558
    DOI: 10.1142/S0129183104006558
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    Keywords

    Quantum computing; entanglement; concurrence; J1–J2model;
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