### Abstract

We investigate the effects of a finite chemical potential μ in QCD viewed as a disordered medium. In the quenched approximation, A_{4} = iμ induces a complex electric Aharonov-Bohm effect that causes the diagonal contribution to the quark return probability to vanish at μ = m_{π}/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 1.5ρ_{0} < p < 3ρ_{0}, where ρ_{0} is nuclear matter density.

Original language | English |
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Pages (from-to) | 123-128 |

Number of pages | 6 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 440 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - Nov 12 1998 |

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

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## Cite this

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,

*440*(1-2), 123-128. https://doi.org/10.1016/S0370-2693(98)01069-7