Nuclear Physics Colloquium

Venue: Physics Building, Max-von-Laue-Str. 1, Seminar Room PHYS 2.116
Time: Thursday, May 19, 4:30 pm (s.t.)
Contact: hees@fias.uni-frankfurt.de

Butterflies and lattices

G. Endrödy (ITP Goethe University Frankfurt)

Using various lattice discretizations ranging from staggered through Wilson to overlap fermions, I discuss the effect of a background magnetic field on the Dirac spectrum. Hofstadter's butterfly reveals itself in a different manner in each setup. The structure of the spectrum implies that magnetic field-induced mass renormalization is necessary for Wilson quarks and also sets non-trivial bounds on the kernel mass for overlap quarks.