RT Journal Article
T1 Fluctuations in the level density of a fermi gas
A1 Relaño Pérez, Armando
A1 Leboeuf, P.
A1 Monastra, A. G.
AB 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.
PB American Physical Society
SN 0031-9007
YR 2005
FD 2005-03-18
LK https://hdl.handle.net/20.500.14352/51284
UL https://hdl.handle.net/20.500.14352/51284
LA eng
NO © 2005 The American Physical Society
DS Docta Complutense
RD 10 abr 2025