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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of super-ohmic dissipation on a disordered quantum critical point

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Author(s):
Vojta, Thomas [1] ; Hoyos, Jose A. [2] ; Mohan, Priyanka [3] ; Narayanan, Rajesh [3]
Total Authors: 4
Affiliation:
[1] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 - USA
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil
[3] Indian Inst Technol, Dept Phys, Madras 600036, Tamil Nadu - India
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 23, n. 9, SI MAR 9 2011.
Web of Science Citations: 7
Abstract

We investigate the combined influence of quenched randomness and dissipation on a quantum critical point with O(N) order-parameter symmetry. Utilizing a strong-disorder renormalization group, we determine the critical behavior in one space dimension exactly. For super-ohmic dissipation, we find a Kosterlitz-Thouless type transition with conventional (power-law) dynamical scaling. The dynamical critical exponent depends on the spectral density of the dissipative baths. We also discuss the Griffiths singularities, and we determine observables. (AU)

FAPESP's process: 10/03749-4 - Quantum phase transitions: effects of disorder and dissipation
Grantee:José Abel Hoyos Neto
Support type: Regular Research Grants