Science and Technology I, Room 306, 4:30pm

QOB informal talk
Dr. Krishnamurthy Vemuru, GMU
X-ray magnetic circular dichroism spectroscopy of ferromagnetic materials

Science and Technology I, Room 306, 11am (+ lunch after noon)

QOB informal talk
Prof. Ana Maria Rey, JILA
Quantum Magnetism with Ultra Cold Polar Molecules

Science and Technology I, Room 306, 11am (+ lunch after noon)

QOB “journal club”
Indu will discuss non-equilibrium topological states based on her preliminary work using kicked 2D lattices in magnetic fields. Related papers are:

• Topological characterization of periodically driven quantum systems
• Floquet topological insulator in semiconductor quantum wells

Science and Technology I, Room 306, 4pm

QOB informal talk
Prof. Shmuel Fishman, Technion University, Israel
Hyper-transport in potentials that are random in space and time

Science and Technology I, Room 306, 11am (+ lunch after noon)

QOB “journal club”
Fractional topological insulators according to Predrag:

• Charge and spin fractionalization in strongly correlated topological insulators
• Correlated topological insulators of Cooper pairs induced by proximity effect

Science and Technology I, Room 306, 11am (+ lunch after noon)

QOB informal talk
Dr. Noah Bray-Ali, JQI-NIST

Bulk Probes of Topological Insulators and Superconductors
Topological insulators and superconductors are incompressible quantum many-body systems with compressible edge excitations. Remarkably, bulk probes, including ground-state properties, can detect and distinguish them from conventional insulators and superconductors. We explore this bulk-edge correspondence in detail for two of the five classes of topological insulators and superconductors in two spatial dimensions, motivated by recent experimental progress on ultracold atoms in a synthetic gauge field and on the odd-parity superconductor strontium ruthenate.

Science and Technology I, Room 306, 11am (+ lunch after noon)

QOB informal talk
Xiaopeng Li, University of Pittsburgh

p-orbital band bosons and complex superfluidity
The “no-node” theorem highly restricts the ground state wavefunctions of bosons. This theorem implies the time-reversal symmetry cannot be spontaneously broken in the ground state of bosons. However, it does not restrict the meta-stable phases of p-orbital band bosons. Recent experiments have succeeded in preparing p band bosons in two dimensions with long life time. We have studied theoretically the meta-stable phases of p band bosons. Both of Mott insulating and superfluid phases with time-reversal symmetry broken, indeed beyond the “node-theorem”, are studied. The momentum distribution of p band Mott insulator, near the Mott- superfluid transition, shows sharp peaks at finite momenta. This indicates new possibilities of preparing coherent matter waves. The superfluid phase is a complex p_x + ip_y superfluid. We found this phase shows more exotic features at finite temperature.