Nov 10, 3:45 PM: Zoom Meeting - JFI Tuesday Seminar - Prof. ...
ABSTRACT: Long-lived excited states of interacting quantum systems that retain quantum correlations and evade thermalization are of great fundamental interest. We have created novel nonthermal states in a bosonic 1D quantum gas of dysprosium by stabilizing a super-Tonks-Girardeau gas against collapse and thermalization with repulsive long-range dipolar interactions. Stiffness and energy-per-particle measurements show that the system is dynamically stable regardless of contact interaction strength. This enables us to cycle contact interactions from weakly to strongly repulsive, then strongly attractive, and finally weakly attractive. We show that this cycle is an energy-space topological pump (due to a quantum holonomy). Iterating this cycle offers an unexplored topological pumping method to create a hierarchy of increasingly excited prethermal states. Host: Jonathan Simon via email at simonjon@uchicago.edu. If you have any questions or may need assistance please contact Brenda Thomas at bthomas@Uchicago.edu. ZOOM MEETING INFORMATION WILL BE SENT VIA EMAIL ANNOUNCEMENT.Date: November 10, 2020Time: 3:45 PM - 4:45 PM