This title appears in the Scientific Report : 2013 

Thermodynamic properties of QCD in external magnetic fields
Bali, G. S.
Bruckmann, F. / Constantinou, M. / Costa, M. / Endrodi, G. / Fodor, Z. / Katz, S. D. / Krieg, S. / Panagopoulos, H. / Schafer, A. / Szabo, K. K.
Jülich Supercomputing Center; JSC
Proceedings of Science, Confinement X S. 197
Trieste SISSA 2013
10th Conference on Quark Confinement and the Hadron Spectrum (Confinement X), Munich (Germany), 2012-10-08 - 2012-10-12
Contribution to a conference proceedings
Computational Science and Mathematical Methods
We consider the effect of strong external electromagnetic fields on thermodynamic observables in QCD, through lattice simulations with 1+1+1 flavors of staggered quarks at physical quark masses. Continuum extrapolated results are presented for the light quark condensates and for their tensor polarizations, as functions of the temperature and the magnetic field. We find the light condensates to undergo inverse magnetic catalysis in the transition region, in a manner that the transition temperature decreases with growing magnetic field. We also compare the results to other approaches and lattice simulations. Furthermore, we relate the tensor polarization to the spin part of the magnetic susceptibility of the QCD vacuum, and show that this contribution is diamagnetic.