New Approach to Thermal Bethe Ansatz
| dc.creator | Destri, C. | |
| dc.creator | de Vega, H. J. | |
| dc.date | 1992-03-24 | |
| dc.date | 1992-05-26 | |
| dc.date.accessioned | 2026-07-07T09:00:57Z | |
| dc.date.available | 2026-07-07T09:00:57Z | |
| dc.description | We present a new approach to the calculation of thermodynamic functions for crossing-invariant models solvable by Bethe Ansatz. In the case of the XXZ Heisemberg chain we derive, for arbitrary values of the anysotropy, a {\bf single} non--linear integral equation from which the free energy can be exactly calculated. The high--temperature expansion follows in a sistematic and relatively simple way. For low temperatures we obtain the correct central charge and predict the analytic structure of the full expansion around $T=0$. Furthermore, we derive a single non-linear integral equation describing the finite--size ground--state energy of the Sine--Gordon quantum field theory. PACS: 05.30, 03.70. 75.10.5 | |
| dc.description | 11 pages | |
| dc.identifier | https://arxiv.org/abs/hep-th/9203064 | |
| dc.identifier | http://arxiv.org/abs/hep-th/9203064 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/148168 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | New Approach to Thermal Bethe Ansatz | |
| dc.type | text |