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Odd-even binding effect from random two-body interactions

delete2002-06-18
delete45
delete
OA
AI
T
T. Papenbrock *
L
L. Kaplan
G
G. F. Bertsch
DOI：10.1103/PhysRevB.65.235120delete
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Abstract

Abstract

En 中文
Systematic odd-even binding energy differences in finite metallic particles are usually attributed to mean-field orbital energy effects or to a coherent pairing interaction. We show analytically and numerically that a purely random two-body Hamiltonian can also give rise to an odd-even staggering. We explore the characteristics of this chaotic mechanism and discuss distinguishing features with respect to the other causes of staggering. In particular, randomness-induced staggering is found to be a smooth function of particle number, and the mechanism is seen to be largely insensitive to the presence of a magnetic field.
Keywords:
2-BODY RANDOM ENSEMBLES
ULTRASMALL SUPERCONDUCTING GRAINS
RANDOM-MATRIX ENSEMBLES
NUCLEAR-SPECTRA
RANDOM POLYNOMIALS
LEVEL STATISTICS
METAL-CLUSTERS
GROUND-STATES
SIMPLE-MODELS
QUANTUM DOTS
AI Summary

AI Summary

Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.

Journal

Physical Review B cover
Physical Review B
IF:
3.7
Papers:
15.4W
Citations:
41.0W

Organization

No organization information available