Quantum Café is CCQ’s ongoing seminar series: open to all bona fide members of the greater NYC scientific community and held every second week, Quantum Café presents a series of informal, highly interactive talks, typically by external speakers, which present the most interesting recent developments and open questions in our field.
Title: Topological order in quantum matter
Abstract: Ideas on topological order have played a prominent role in studies of states of quantum matter with an energy gap: e.g. spin liquid insulators and fractional quantum Hall liquids. However these ideas can also be important in gapless states, including in metals found in numerous correlated electron compounds. I will present simple models of metals with topological order, and compare some results with numerical studies of the Hubbard model on the square lattice.