Open Access
Issue
EPL
Volume 88, Number 2, October 2009
Article Number 27003
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/88/27003
Published online 03 November 2009
EPL, 88 (2009) 27003
DOI: 10.1209/0295-5075/88/27003

Internal chaos in an open quantum system: From Ericson to conductance fluctuations

S. Sorathia1, F. M. Izrailev1, 2, G. L. Celardo3, V. G. Zelevinsky2 and G. P. Berman4

1   Instituto de Física, Universidad Autónoma de Puebla - Apartado Postal J-48, 72570 Puebla, Mexico
2   NSCL and Department of Physics and Astronomy, Michigan State University - East Lansing, MI 48824-1321, USA
3   Physics Department, Tulane University - New Orleans, LA 70118, USA
4   Theoretical Division and CNLS, Los Alamos National Laboratory - Los Alamos, NM 87545, USA

felix.izrailev@gmail.com

received 21 May 2009; accepted in final form 1 October 2009; published October 2009
published online 3 November 2009

Abstract
The model of an open Fermi system is used for studying the interplay of intrinsic chaos and irreversible decay into open continuum channels. Two versions of the model are characterized by one-body chaos coming from disorder or by many-body chaos due to the inter-particle interactions. The continuum coupling is described by the effective non-Hermitian Hamiltonian. Our main interest is in specific correlations of cross-sections for various channels in dependence on the coupling strength and degree of internal chaos. The results are generic and refer to common features of various mesoscopic objects including conductance fluctuations and resonance nuclear reactions.

PACS
73.23.-b - Electronic transport in mesoscopic systems.
24.60.Lz - Chaos in nuclear systems.
21.60.-n - Nuclear structure models and methods.

© EPLA 2009