Chiral disorder and QCD at finite chemical potential

Romuald A. Janik, Maciej A. Nowak, Gabor Papp, Ismail Zahed

Research output: Contribution to journalArticle

4 Citations (Scopus)


We investigate the effects of a finite chemical potential μ in QCD viewed as a disordered medium. In the quenched approximation, A4 = iμ induces a complex electric Aharonov-Bohm effect that causes the diagonal contribution to the quark return probability to vanish at μ = mπ/2 (half the pion mass). In two-color QCD, the weak-localization contribution to the quark return probability remains unaffected causing a mutation in the spectral statistics. In full QCD, the complex electric flux is screened and the light quarks are shown to diffuse asymmetrically with a substantial decrease in the conductivity along the 'spatial' directions. Mean-field arguments suggest that a d = 1 percolation transition may take place in the range 1.5ρ0 < p < 3ρ0, where ρ0 is nuclear matter density.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - Nov 12 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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