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Entanglement witness for spin glass

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  • Koh, C.Y.
  • Kwek, L.C.

Abstract

We derived the entanglement witness (EW) in the Ising model for both the magnetic susceptibility and specific heat capacity of a spin glass. The magnetic susceptibility EW curve for LiHoxY 1−xF4 is formulated and compared with the existing data of LiHo0.167Y 0.833F4 to identify the entangled and unentangled regions. The EW for the magnetic susceptibility was found to cut the cusp of the experimental result at a critical temperature of about 0.2669 K. The specific heat capacity EW curve for CuxMn is formulated and compared with the existing data of Cu0.279 Mn to identify the entangled and unentangled region for the various applied magnetic field B. With increasing B, the critical temperature where the EW curve intersects the experimental data, increases as well.

Suggested Citation

  • Koh, C.Y. & Kwek, L.C., 2015. "Entanglement witness for spin glass," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 420(C), pages 324-330.
    • Handle: RePEc:eee:phsmap:v:420:y:2015:i:c:p:324-330
    DOI: 10.1016/j.physa.2014.11.004
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    References listed on IDEAS

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    1. Vlatko Vedral, 2008. "Quantifying entanglement in macroscopic systems," Nature, Nature, vol. 453(7198), pages 1004-1007, June.
    2. Koh, C.Y. & Kwek, L.C., 2014. "Entanglement of a 2-qubit system coupled to a bath of quantum spin glass," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 403(C), pages 54-64.
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