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Spectrum of Dirac operator and role of winding number in QCD

Leutwyler, H., Smilga, A.·1992·Physical Review D

Abstract

We show that very general considerations based on the properties of the partition function of QCD allow one to extract information about the eigenvalues of the Dirac operator in vacuum gauge fields. In particular, we demonstrate that the familiar suppression of field configurations with a nontrivial topology occurring for small quark masses is a finite size effect which disappears if the four-dimensional volume $V$ is large enough. The formation of a quark condensate is connected with the occurrence of small eigenvalues of order ${\ensuremath{\lambda}}_{n}\ensuremath{\propto}\frac{1}{V}$.

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Metadata

Authors
Leutwyler, H., & Smilga, A.
Venue
Physical Review D
Published
1992-12-15
Volume
46
Issue
12
Pages
5607-5632
ISSN
0556-2821 (ISSN-L)
OpenAlex
W2028043408
Cited by
696
References
0
FWCI
7.04
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Spectrum of Dirac operator and role of winding number in QCD. https://app.cochat.ai/papers/10.1103/physrevd.46.5607
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Leutwyler, H., & Smilga, A. (1992). Spectrum of Dirac operator and role of winding number in QCD. Physical Review D. https://doi.org/10.1103/physrevd.46.5607

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