2026-06-29T02:49:06Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/512842023-08-25T11:13:52Zcom_20.500.14352_14col_20.500.14352_15

Fluctuations in the level density of a fermi gas Relaño Pérez, Armando Leboeuf, P. Monastra, A. G. 536 Nucleus Formula Termodinámica 2213 Termodinámica © 2005 The American Physical Society We present a theory that accurately describes the counting of excited states of a noninteracting fermionic gas. At high excitation energies the results reproduce Bethe's theory. At low energies oscillatory corrections to the many-body density of states, related to shell effects, are obtained. The fluctuations depend nontrivially on energy and particle number. Universality and connections with Poisson statistics and random matrix theory are established for regular and chaotic single-particle motion. Depto. de Estructura de la Materia, Física Térmica y Electrónica Fac. de Ciencias Físicas TRUE pub 2023-06-20T10:49:15Z 2023-06-20T10:49:15Z 2005-03-18 journal article https://hdl.handle.net/20.500.14352/51284 0031-9007 10.1103/PhysRevLett.94.102502 eng open access application/pdf American Physical Society