The volume collects papers from talks given at QMath11 — Mathematical Results in Quantum Physics, which was held in Hradec Králové, September 2010. These papers bring new and interesting results in quantum mechanics and information, quantum field theory, random systems, quantum chaos, as well as in the physics of social systems. Part of the contribution is dedicated to Ari Laptev on the occasion of his 60th birthday, in recognition of his mathematical results and his service to the community. The QMath conference series has played an important role in mathematical physics for more than two decades, typically attracting many of the best results achieved in the last three-year period, and the meeting in Hradec Králové was no exception.Contents:Relative Entropies and Entanglement Monotones (Nilanjana Datta)Interacting Electrons on the Honeycomb Lattice (Alessandro Giuliani)Convergence Results for Thick Graphs (Olaf Post)Spectral Properties of Wigner Matrices (Benjamin Schlein)Semiclassical Spectral Bounds and Beyond (Timo Weidl)Spectral Problems in Spaces of Constant Curvature (Rafael D Benguria)Localization in Random Displacement Model (Michael Loss & Günther Stolz)Diffusion in Hamiltonian Quantum Systems (Wojciech De Roeck)Quantized Open Chaotic Systems (Stéphen Nonnenmacher)Reliability Issues in the Microscopic Modeling of Pedestrian Movement (Bernhard Steffen, Armin Seyfried & Maik Boltes)and other papersReadership: Graduate students, professionals and researchers in mathematical physics, quantum mechanics and field theory, quantum information, quantum chaos and physics of social systems.