Magnetic-Field-Induced Insulator-Conductor Transition in SU(2) Quenched Lattice Gauge Theory

被引：151

作者：

Buividovich, P. V. ^{[1
,2
]}

Chernodub, M. N. ^{[3
,4
]}

Kharzeev, D. E. ^{[5
,6
]}

Kalaydzhyan, T. ^{[1
,7
]}

Luschevskaya, E. V. ^{[1
,2
]}

Polikarpov, M. I. ^{[1
]}

机构：

[1] ITEP, Moscow 117218, Russia

[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[3] Univ Tours, LMPT, CNRS UMR 6083, F-37200 Tours, France

[4] Univ Ghent, DMPA, B-9000 Ghent, Belgium

[5] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[6] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[7] DESY, Theory Grp, D-22607 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 13期

关键词：

DILEPTON EMISSION; QCD; COLLISIONS; VIOLATION; PHOTON; PLASMA;

D O I：

10.1103/PhysRevLett.105.132001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the correlator of two vector currents in quenched SU(2) lattice gauge theory with a chirally invariant lattice Dirac operator with a constant external magnetic field. It is found that in the confinement phase the correlator of the components of the current parallel to the magnetic field decays much slower than in the absence of a magnetic field, while for other components the correlation length slightly decreases. We apply the maximal entropy method to extract the corresponding spectral function. In the limit of zero frequency this spectral function yields the electric conductivity of quenched theory. We find that in the confinement phase the external magnetic field induces nonzero electric conductivity along the direction of the field, transforming the system from an insulator into an anisotropic conductor. In the deconfinement phase the conductivity does not exhibit any sizable dependence on the magnetic field.

引用

页数：4

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