Effects of dissipation on disordered quantum spin models

Abstract

We study the effects of the coupling to an Ohmic quantum reservoir on the static and dynamical properties of a family of disordered SU(2) spin models in a transverse magnetic field using a method of direct spin summation. The tendency to form a glassy phase increases with the strength of the coupling of the system to the environment. We study the influence of the environment on the features of the phase diagram of the various models as well as the stability of the possible phases.

24 pages, 8 figs

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• Dynamic Compressibility and aging in Wigner crystals and quantum glasses
• Quantum quenches in isolated quantum glasses out of equilibrium
• Static properties of the dissipative random quantum Ising ferromagnetic chain
• Violation of the Fluctuation-Dissipation Theorem and Heating Effects in the Time-Dependent Kondo Model
• Critical properties of dissipative quantum spin systems in finite dimensions
• Large time effective kinetics $\beta$-functions for quantum (2+p)-spin glass
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