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Quantum site-random XY spin glasses in a random field

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  • Ma, Yu-qiang

Abstract

A quantum spherical version of the site-random XY model in the presence of random field is presented in the boson space. In the phase diagram drawn as a function of the strength of random field, we find that the ferromagnetic and spin-glass phases are reduced by quantum fluctuations and destroyed completely by random-field fluctuations with sufficiently large values of the random-field variance.

Suggested Citation

  • Ma, Yu-qiang, 1997. "Quantum site-random XY spin glasses in a random field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 245(3), pages 231-237.
    • Handle: RePEc:eee:phsmap:v:245:y:1997:i:3:p:231-237
    DOI: 10.1016/S0378-4371(97)00321-X
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    1. Judith Wooldridge & Genevieve Kenney & Christopher Trenholm & Lisa Dubay & Ian Hill & Myoung Kim & Lorenzo Moreno & Anna Sommers & Stephen Zuckerman, "undated". "Congressionally Mandated Evaluation of the State Children's Health Insurance Program," Mathematica Policy Research Reports 87c25bcd774a4d3f931653747, Mathematica Policy Research.
    2. Marilyn Sawyer Sommers & Joanne S. Stevenson & Robert L. Hamlin & Tom D. Ivey, 1995. "Skin Temperature and Limb Blood Flow as Predictors of Cardiac Index," Clinical Nursing Research, , vol. 4(1), pages 22-37, February.
    3. Judith Reppy, 1990. "The Technological Imperative in Strategic Thought," Journal of Peace Research, Peace Research Institute Oslo, vol. 27(1), pages 101-106, February.
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    Keywords

    Phase transitions; Disordered system;

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