Please use this identifier to cite or link to this item:
https://doi.org/10.21256/zhaw-1902| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Quasi-degeneracies in a 2-spin system : symmetry aspects and a perturbational approach to tunnel splitting |
| Authors: | Schatzer, Laro Breymann, Wolfgang Thomas, Harry |
| DOI: | 10.21256/zhaw-1902 10.1007/s002570050190 |
| Published in: | Zeitschrift für Physik B: Condensed Matter |
| Volume(Issue): | 101 |
| Issue: | 1 |
| Page(s): | 131 |
| Pages to: | 139 |
| Issue Date: | 1996 |
| Publisher / Ed. Institution: | Springer |
| ISSN: | 0722-3277 1431-584X |
| Language: | English |
| Subject (DDC): | 530: Physics |
| Abstract: | A large number of energy levels in different invariant subspaces of the anisotropic XY-model are quasi-degenerate in a wide parameter range, i.e., their spacing is much smaller than the mean level spacing of the system. These quasi-degeneracies can be interpreted in two ways: (i) as tunnel splitting, (ii) as weak level splitting related to a parametric point of exact degeneracy. Starting from the second interpretation we calculate the tunnel splitting by use of perturbative methods. |
| Further description: | «Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)» |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/4620 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Data Analysis and Process Design (IDP) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Schatzer_Quasi-degeneracies_European Physical Journal B.pdf | 254.03 kB | Adobe PDF |  View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.