Effects of Dissipation on a Quantum Critical Point with Disorder

2007/05/31 by J. A. Hoyos, José A. Hoyos, Chetan Kotabage +1 · 3 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.99.230601

published as Phys. Rev. Lett. 99, 230601 (2007) · 4 pages, 1 figure, final version, as published

arxiv created 2007/12/04 · openalex publication_date 2007/12/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the effects of dissipation on a disordered quantum phase transition with O(N) order-parameter symmetry by applying a strong-disorder renormalization group to the Landau-Ginzburg-Wilson field theory of the problem. We find that Ohmic dissipation results in a nonperturbative infinite-randomness critical point with unconventional activated dynamical scaling while super-Ohmic damping leads to conventional behavior. We discuss applications to the superconductor-metal transition in nanowires and to the Hertz theory of the itinerant antiferromagnetic transition.

Citations

• Quantum critical phenomena
• Absence of Conventional Quantum Phase Transitions in Itinerant Systems with Disorder
• Universal Conductance of Nanowires near the Superconductor-Metal Quantum Transition
• Dynamics of the dissipative two-state system
• Disorder-driven non-Fermi liquid behaviour of correlated electrons

Cited by

• Infinite Randomness Fixed Point of the Superconductor-Metal Quantum Phase Transition
• Theory of Smeared Quantum Phase Transitions
• Random elastic networks: a strong disorder renormalization approach