Title

Dissipation Effects in Percolating Quantum Ising Magnets

Abstract

We study the effects of dissipation on a randomly dilute transverse-field Ising magnet at and close to the percolation threshold. For weak transverse fields, a novel percolation quantum phase transition separates a super-paramagnetic cluster phase from an inhomogeneously ordered ferromagnetic phase. The properties of this transition are dominated by large frozen and slowly fluctuating percolation clusters. Implementing numerically a strong-disorder real space renormalization group technique, we compute the low-energy density of states which is found to be in good agreement with the analytical prediction.

Department(s)

Physics

Sponsor(s)

National Science Foundation (U.S.)
Research Corporation

Keywords and Phrases

Disordered Systems; Dissipation; Quantum Phase Transition; Percolation

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 Elsevier, All rights reserved.

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