Spectral density from instantons in quenched QCD

Journal article

We investigate the contribution of instantons to the eigenvalue spectrum of the Dirac operator in quenched QCD. The instanton configurations that we use have been derived, elsewhere, from cooled SU(3) lattice gauge fields and, for comparison, we also analyze a random "gas" of instantons. Using a set of simplifying approximations, we find a non-zero chiral condensate. However, we also find that the spectral density diverges for small eigenvalues, so that the chiral condensate, at zero quark ma...

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Authors: Sharan, U; Teper, M

• Publication status: Published
• Journal: Physical Review D
• Volume: 60
• Issue: 5
• Pages: 1-12
• Publication date: 1999-09-01
• ISSN: 1550-7998
• Language: English