Poisson-random matrix transition in the QCD Dirac spectrum

T. Kovács, Ferenc Pittler

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

At zero temperature the lowest part of the spectrum of the QCD Dirac operator is known to consist of delocalized modes that are described by random matrix statistics. In the present paper we show that the nature of these eigenmodes changes drastically when the system is driven through the finite temperature crossover. The lowest Dirac modes that are delocalized at low temperature become localized on the scale of the inverse temperature. At the same time the spectral statistics changes from random matrix to Poisson statistics. We demonstrate this with lattice QCD simulations using 2+1 flavors of light dynamical quarks with physical masses. Drawing an analogy with Anderson transitions we also examine the mobility edge separating localized and delocalized modes in the spectrum. We show that it scales in the continuum limit and increases sharply with the temperature.

Original languageEnglish
Article number114515
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number11
DOIs
Publication statusPublished - Dec 28 2012

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quantum chromodynamics
statistics
temperature
crossovers
quarks
continuums
operators
simulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Poisson-random matrix transition in the QCD Dirac spectrum. / Kovács, T.; Pittler, Ferenc.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 86, No. 11, 114515, 28.12.2012.

Research output: Contribution to journalArticle

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