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Title: Entanglement and quantum phase transition of spin glass: A renormalization group approach
Authors: Koh, Chee Yeong
Kwek, Leong Chuan
Issue Date: 2014
Citation: Koh, C. Y., & Kwek, L. C. (2014). Entanglement and quantum phase transition of spin glass: A renormalization group approach. Physics Letters A, 378(37), 2743-2749.
Abstract: Using a renormalization group approach, we study the entanglement properties of two spin glass models: the XXZ Heisenberg (with Dzyaloshinskii-Moriya interaction) and Ising transverse fi eld spin glasses. The concurrence for both models are obtained through the Kadanoff 's renormalization group (RG) approach with random Jzi and Ji respectively. The constant couplings in the RG flow is randomized through the Gaussian distribution. For Δ = 0 corresponding to a non-spin glass material, a first-order transition is expected. By varying Δ= 0.05 to 0.5, the spin glass e ffect broadens the sharp transition resulting in a second-order-like transition. The fluctuations in the average concurrence for the spin glass case as measured by the standard deviations is also a good indicator of quantum phase transition.
Description: This is the final draft, after peer-review, of a manuscript published in Physics Letters A. The published version is available online at
ISSN: 0375-9601 (print)
0031-9163 (online)
Other Identifiers: 10.1016/j.physleta.2014.07.042
Appears in Collections:Journal Articles

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