arXiv 0909.18082009-09-15hep-phhep-lathep-th

强磁场中的格点量子色动力学

Lattice QCD in strong magnetic fields

P. V. Buividovich, M. N. Chernodub, E. V. Luschevskaya, M. I. Polikarpov

备注：: 12 pages, 12 figures, talk given by M. N. Chernodub at the 10th Workshop on Non-Perturbative QCD, June 8-12, 2009, Paris, France; revision: acknowledgments added, small changes in wording

摘要：

强（强子尺度）磁场中的量子色动力学真空表现出许多有趣的非微扰效应。这些效应中的一些可以在淬火QCD的晶格模拟的帮助下进行研究。我们回顾了我们最近的研究结果，证明了很强的外磁场导致（1）手征对称性破缺的增强[夸克凝聚随外磁场的增加而增加]，（2）QCD真空的手征磁化[夸克的自旋平行于外场]，（3）QCD真空的手征磁化[夸克的自旋平行于外磁场]，（4）QCD真空的手征磁化[夸克的自旋平行于外磁场]。（3）手征磁效应[夸克的电流沿磁场方向的CP-奇数产生]：（4）夸克的反常电偶极矩沿磁场轴的CP-奇数产生。前三个效应已经在理论上预测，随后在我们的模拟中进行了数值观察，而第四个效应是一个新的结果。

英文摘要：

Vacuum of Quantum Chromodynamics in very strong (hadron-scale) magnetic fields exhibits many interesting nonperturbative effects. Some of these effects can be studied with the help of lattice simulations in quenched QCD. We review our recent results demonstrating that very strong external magnetic fields lead to (1) the enhancement of the chiral symmetry breaking [the quark condensate rises with the increase of the external magnetic field]; (2) the chiral magnetization of the QCD vacuum [spins of the quarks turn parallel to the external field]; (3) the chiral magnetic effect [a CP-odd generation of the electric current of quarks directed along the magnetic field]; (4) a CP-odd generation of the anomalous quark electric dipole moment along the axis of magnetic field. The first three effects were already predicted theoretically, and subsequently observed numerically in our simulations, while the fourth effect is a new result.

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摘要：

英文摘要：

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