Flow equation approach to the pairing problems
| dc.creator | Domanski, T. | |
| dc.date | 2006-02-09 | |
| dc.date.accessioned | 2026-07-07T10:05:21Z | |
| dc.date.available | 2026-07-07T10:05:21Z | |
| dc.description | We apply the flow equation method for studying the fermion systems where pairing interactions can either trigger the BCS instability with the symmetry breaking manifested by the off-diagonal order parameter or lead to the gaped single particle spectrum without any symmetry breaking. We construct the continuous Bogoliubov transformation in a scheme resembling the renormalization group procedure. We further extend this continuous transformation to a case where fermion pairs interact with the boson field. Due to temporal quantum fluctuations the single particle excitation spectrum develops a gap which is centered around the renormalized boson energy. When bosons undergo the Bose Einstein condensation this structure evolves into the BCS spectrum. | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0602236 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0602236 | |
| dc.identifier | Cond. Mat. Phys. 11, 195 (2008). | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/169988 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Flow equation approach to the pairing problems | |
| dc.type | text |