condensedmatter condensedmatterphysics eichfeld exercises festkorper festkörper fieldtheory(physics) gaugefields(physics) gravitation gravity holography kondensiertematerie kwantumveldentheorie mathematicalmodels mathematicalphysics mathematischephysik nonfiction particles(nuclearphysics) phy023f phy412f physics problems quantengravitation quantumfieldtheory quantumfieldtheoryelementaryparticles quantumtheory sci040000 science standardmodell(elementarteilchenphysik) textbooks uo4000 vastestoffysica wavemechanics waves