National Center for Computational Sciences

PI: Tommasco Roscilde, Max-Planck Gesellschaft

This project focuses on the study of novel quantum phases and quantum-phase transitions in disordered quantum antiferromagnets subject to a magnetic field. In the absence of disorder, a strong magnetic field can drive quantum antiferromagnets with a spin gap through a quantum-phase transition characterized by the Bose-Einstein condensation of triplet quasiparticles. The presence of disorder is expected to induce a novel quantum-disordered phase dominated by quantum localization (Bose glass) before condensation occurs. This project is framed within a collaboration with the National High Magnetic Field Laboratories at Los Alamos, aimed at the observation of boson localization in quantum magnetic systems, which would then represent the first experimental realization of a Bose glass.