Once more on the equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems
| dc.creator | Brankov, J. G. | |
| dc.creator | Tonchev, N. S. | |
| dc.creator | Zagrebnov, V. A. | |
| dc.date | 2005-08-04 | |
| dc.date.accessioned | 2026-07-07T06:13:18Z | |
| dc.date.available | 2026-07-07T06:13:18Z | |
| dc.description | In answer to the replies of Reslen {\it et al} [arXiv: quant-ph/0507164 (2005)], and Liberti and Zaffino [arXiv:cond-mat/0507019, (2005)], we comment once more on the temperature-dependent effective Hamiltonians for the Dicke model derived by them in [Europhys. Lett., {\bf 69} (2005) 8] and [Eur. Phys. J., {\bf 44} (2005) 535], respectively. These approximate Hamiltonians cannot be correct for any finite nonzero temperature because they both violate a rigorous result. The fact that the Dicke model belongs to the universality class of, and its thermodynamics is described by the infinitely coordinated transverse-field XY model is known for more than 30 years. | |
| dc.description | 3 pages | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0508039 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0508039 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/93058 | |
| dc.subject | Quantum Physics | |
| dc.title | Once more on the equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems | |
| dc.type | text |