Numerical Renormalization Group for Bosonic Systems and Application to the Subohmic Spin-Boson Model
| dc.creator | Bulla, Ralf | |
| dc.creator | Tong, Ning-Hua | |
| dc.creator | Vojta, Matthias | |
| dc.date | 2003-06-27 | |
| dc.date | 2003-10-28 | |
| dc.date.accessioned | 2026-07-07T02:52:06Z | |
| dc.date.available | 2026-07-07T02:52:06Z | |
| dc.description | We describe the generalization of Wilson's Numerical Renormalization Group method to quantum impurity models with a bosonic bath, providing a general non-perturbative approach to bosonic impurity models which can access exponentially small energies and temperatures. As an application, we consider the spin-boson model, describing a two-level system coupled to a bosonic bath with power-law spectral density, J(omega) ~ omega^s. We find clear evidence for a line of continuous quantum phase transitions for subohmic bath exponents 0<s<1; the line terminates in the well-known Kosterlitz-Thouless transition at s=1. Contact is made with results from perturbative renormalization group, and various other applications are outlined. | |
| dc.description | 4 pages, 5 figs, (v2) final version as published | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0306708 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0306708 | |
| dc.identifier | Phys. Rev. Lett. 91, 170601 (2003) | |
| dc.identifier | doi:10.1103/PhysRevLett.91.170601 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21714 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Quantum Physics | |
| dc.title | Numerical Renormalization Group for Bosonic Systems and Application to the Subohmic Spin-Boson Model | |
| dc.type | text |