ISSN:
1090-6487
Keywords:
71.10.Ca
;
05.30.Fk
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The stability of a fermion system is analyzed for a model repulsive pair interaction potential. The possibility of different types of restructuring of the Fermi ground state (at sufficiently great coupling constant) is related to the analyticity properties of such potential. In particular, for the screened Coulomb law it is shown that the restructuring cannot be of the Fermi condensation type, known earlier for some exactly solvable models, but instead belongs to the class of topological transitions. A phase diagram constructed for this model in the variables “screening parameter-coupling constant” displays two kinds of topological transitions: a “5/2” kind, similar to the known Lifshitz transitions in metals, and a “2” kind, characteristic for a uniform strongly interacting system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.567952
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