Dynamics of a Two-Level System Coupled to Ohmic Bath: A Perturbation Approach
| dc.creator | Zheng, H. | |
| dc.date | 2002-10-08 | |
| dc.date.accessioned | 2026-07-07T02:47:37Z | |
| dc.date.available | 2026-07-07T02:47:37Z | |
| dc.description | The physics of a two-level system coupled to Ohmic bath is studied by means of the perturbation approach based on a unitary transformation. Our main results are: The coherence-incoherence transition is at $α_c={1\over 2}[1+Δ_r/ω_c]$; for $α<α_c$ the dynamical quantity $P(t)=\cos(ω_0 t)\exp(-γt)$; the sussceptibility $χ^{\prime\prime}(ω)/ω$ is of a double peak structure for $α<α_c$ and the Shiba's relation is exactly satisfied; at the transition point $α=α_c$ the real time correlation function $C(t)\approx -1/γ^2_c t^2$ in the long time limit. | |
| dc.description | 9 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0210150 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0210150 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/20078 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Dynamics of a Two-Level System Coupled to Ohmic Bath: A Perturbation Approach | |
| dc.type | text |