Open system of interacting fermions: statistical properties of cross sections and fluctuations.

Open system of interacting fermions: statistical properties of cross sections and fluctuations. Research Abstract Details 

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Open system of interacting fermions: statistical properties of cross sections and fluctuations. Abstract Text:

G L Celardo,F M Izrailev,V G Zelevinsky,G P Berman,G L Celardo,F M Izrailev,V G Zelevinsky,G P Berman,

Statistical properties of cross sections are studied for an open system of interacting fermions. The description is based on the effective non-Hermitian Hamiltonian that accounts for the existence of open decay channels preserving the unitarity of the scattering matrix. The intrinsic interaction is modeled by the two-body random ensemble of variable strength. In particular, the crossover region from isolated to overlapping resonances accompanied by the effect of the width redistribution creating superradiant and trapped states is studied in detail. The important observables, such as average cross section, its fluctuations, autocorrelation functions of the cross section, and scattering matrix, are very sensitive to the coupling of the intrinsic states to the continuum around the crossover. A detailed comparison is made of our results with standard predictions of statistical theory of cross sections, such as the Hauser-Feshbach formula for the average cross section and Ericson theory of fluctuations and correlations of cross sections. Strong deviations are found in the crossover region, along with the dependence on intrinsic interactions and the degree of chaos inside the system.

Open system of interacting fermions: statistical properties of cross sections and fluctuations. Publishing Authors By Initials

GL Celardo,FM Izrailev,VG Zelevinsky,GP Berman,GL Celardo,FM Izrailev,VG Zelevinsky,GP Berman,

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Open system of interacting fermions: statistical properties of cross sections and fluctuations. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 76

Page Numbers: 031119

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ISSN: 1539-3755

DAY: 13

MONTH: 09

YEAR: 2007

Open system of interacting fermions: statistical properties of cross sections and fluctuations. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Open system of interacting fermions: statistical properties of cross sections and fluctuations.

AFFILIATION: Instituto de Física, Universidad Autónoma de Puebla, Apartado Postal J-48, Puebla, Pue. 72570, Mexico.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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