Oct 22: William Cody Burton on “Observation of Bose-Einstein Condensation in a Strong Synthetic Magnetic Field”

Title: Observation of Bose-Einstein Condensation in a Strong Synthetic Magnetic Field
Location: 26-214, Thursday Oct 22 Noon-1pm. Pizza at 11:45!
(Feel free to bring your own cup and plate)

Abstract: The study of topological states of matter is an active frontier in physics. Much of the research with ultracold atoms has focused on the paradigmatic Harper-Hofstadter Hamiltonian, which describes charged particles in a lattice with a strong homogeneous magnetic field, whose single-particle spectrum is given by Hofstadter‘s butterfly and whose sub-bands exhibit non-zero Chern numbers and Dirac points. We present the first observation of Bose-Einstein condensation and superfluidity in Hofstadter’s butterfly. Ballistic expansion reveals the gauge-dependent wavefunction and ground state degeneracy for the field chosen. Finally, we discuss potential heating mechanisms and a method to compensate for shot-noise-induced dephasing.

“With the NSF’s generous support, which will combine with resources that MIT will devote as well as participation from a broad consortium of government and industry partners, we are going to tackle the educational and learning challenges in quantum information science with an innovative, interdisciplinary approach to training the new generation of QIS scientists and engineers.”

—Isaac Chuang, Director, iQuISE, and Associate Professor of Electrical Engineering and Associate Professor of Physics