Electric charge catalysis by magnetic fields and a nontrivial holonomy
Electric charge catalysis by magnetic fields and a nontrivial holonomy
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磁场的电荷催化和非平凡的完整律
DOI:
10.1103/physrevd.88.045009
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发表时间:
--
影响因子:
5
通讯作者:
T. Sulejmanpasic
中科院分区:
文献类型:
--
作者:
Falk Bruckmann;P.V. Buividovich;T. Sulejmanpasic
We describe a generic mechanism by which a system of Dirac fermions in thermal equilibrium acquires electric charge in an external magnetic field. To this end the fermions should have an additional quantum number, isospin, or color and should be subject to a second magnetic field, which distinguishes the isospin or color, as well as to a corresponding isospin chemical potential. The role of the latter can be also played by a nontrivial holonomy (Polyakov loop) along the Euclidean time direction. The charge is accumulated since the degeneracies of occupied lowest Landau levels for particles of positive isospin and antiparticles of negative isospin are different. We discuss two physical systems where this phenomenon can be realized. One is monolayer graphene, where the isospin is associated with two valleys in the Brillouin zone, and the strain-induced pseudomagnetic field acts differently on charge carriers in different valleys. Another is hot QCD, for which the relevant non-Abelian field configurations with both nonzero chromomagnetic field and a nontrivial Polyakov loop can be realized as calorons—topological solutions of Yang-Mills equations at finite temperature. The induced electric charge on the caloron field configuration is studied numerically. We argue that due to the fluctuations of holonomy, the external magnetic field should tend to suppress charge fluctuations in the quark-gluon plasma and estimate the importance of this effect for off-central heavy-ion collisions.
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影响因子:
5.4
作者:
G. Basar;G. Dunne;M. Ünsal
通讯作者:
M. Ünsal
DOI:
--
发表时间:
2006
期刊:
arXiv: High Energy Physics - Lattice
影响因子:
--
作者:
A. Boriçi;Alban Allkoci
通讯作者:
Alban Allkoci
影响因子:
5
作者:
Bornyakov, V. G.;Ilgenfritz, E. -M.;Mueller-Preussker, M.
通讯作者:
Mueller-Preussker, M.
影响因子:
5
作者:
E. Ilgenfritz;B. Martemyanov;M. Muller;A. Veselov
通讯作者:
A. Veselov
影响因子:
5
作者:
F. Bruckmann;R. Rodl;T. Sulejmanpasic
通讯作者:
T. Sulejmanpasic