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29 March 2024
 
  » arxiv » cond-mat/9712036

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Chaos Thresholds in finite Fermi systems
P. G. Silvestrov ;
Date 3 Dec 1997
Journal Phys. Rev. E58 (1998) 5629-5636
Subject Mesoscopic Systems and Quantum Hall Effect; Chaotic Dynamics | cond-mat.mes-hall chao-dyn nlin.CD nucl-th
AffiliationBudker Institute of Nuclear Physics, Novosibirsk
AbstractThe development of Quantum Chaos in finite interacting Fermi systems is considered. At sufficiently high excitation energy the direct two-particle interaction may mix into an eigen-state the exponentially large number of simple Slater-determinant states. Nevertheless, the transition from Poisson to Wigner-Dyson statistics of energy levels is governed by the effective high order interaction between states very distant in the Fock space. The concrete form of the transition depends on the way one chooses to work out the problem of factorial divergency of the number of Feynman diagrams. In the proposed scheme the change of statistics has a form of narrow phase transition and may happen even below the direct interaction threshold.
Source arXiv, cond-mat/9712036
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