Universal Properties of Many-Body Delocalization Transitions
Physical Review X American Physical Society (APS) 5:3 (2015) 031033
Quantum criticality of hot random spin chains.
Physical review letters 114:21 (2015) 217201
Abstract:
We study the infinite-temperature properties of an infinite sequence of random quantum spin chains using a real-space renormalization group approach, and demonstrate that they exhibit nonergodic behavior at strong disorder. The analysis is conveniently implemented in terms of SU(2)_{k} anyon chains that include the Ising and Potts chains as notable examples. Highly excited eigenstates of these systems exhibit properties usually associated with quantum critical ground states, leading us to dub them "quantum critical glasses." We argue that random-bond Heisenberg chains self-thermalize and that the excited-state entanglement crosses over from volume-law to logarithmic scaling at a length scale that diverges in the Heisenberg limit k→∞. The excited state fixed points are generically distinct from their ground state counterparts, and represent novel nonequilibrium critical phases of matter.Quantum revivals and many-body localization
Physical Review B American Physical Society (APS) 91:14 (2015) 140202
Anomalous Fermi-liquid phase in metallic skyrmion crystals
Physical Review B American Physical Society (APS) 90:4 (2014) 045145
Probing the Chiral Anomaly with Nonlocal Transport in Three-Dimensional Topological Semimetals
Physical Review X American Physical Society (APS) 4:3 (2014) 031035