| Texto completo | |
| Autor(es): |
Vojta, Thomas
;
Hoyos, Jose A.
;
Mohan, Priyanka
;
Narayanan, Rajesh
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHYSICS-CONDENSED MATTER; v. 23, n. 9, p. 7-pg., 2011-03-09. |
| Resumo | |
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) | |
| Processo FAPESP: | 10/03749-4 - Transições de fase quânticas: efeitos de desordem e dissipação |
| Beneficiário: | José Abel Hoyos Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |