Equilibrium and non-equilibrium dynamics of the sub-ohmic spin-boson model
| dc.creator | Anders, Frithjof B. | |
| dc.creator | Bulla, Ralf | |
| dc.creator | Vojta, Matthias | |
| dc.date | 2006-07-18 | |
| dc.date | 2007-05-25 | |
| dc.date.accessioned | 2026-07-07T08:05:33Z | |
| dc.date.available | 2026-07-07T08:05:33Z | |
| dc.description | Employing the non-perturbative numerical renormalization group method, we study the dynamics of the spin-boson model, which describes a two-level system coupled to a bosonic bath with spectral density J(omega) propto omega^s. We show that, in contrast to the case of ohmic damping, the delocalized phase of the sub-ohmic model cannot be characterized by a single energy scale only, due to the presence of a non-trivial quantum phase transition. In the strongly sub-ohmic regime, s<<1, weakly damped coherent oscillations on short time scales are possible even in the localized phase - this is of crucial relevance, e.g., for qubits subject to electromagnetic noise. | |
| dc.description | 4 pages, 6 figures; final version, as published | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0607443 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0607443 | |
| dc.identifier | Phys. Rev. Lett. 98, 210402 (2007) | |
| dc.identifier | doi:10.1103/PhysRevLett.98.210402 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/130315 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Equilibrium and non-equilibrium dynamics of the sub-ohmic spin-boson model | |
| dc.type | text |