Bulletin of the American Physical Society
47th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 61, Number 8
Monday–Friday, May 23–27, 2016; Providence, Rhode Island
Session N2: Invited Session: Out of Equilibrium Dynamics in Many-Body AMO SystemsInvited
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Chair: Brian Desalvo, University of Chicago Room: Ballroom B |
Thursday, May 26, 2016 10:30AM - 11:00AM |
N2.00001: Bose Gases With Fully Resonant Interactions: Where Few-body Meets Many-Body? Invited Speaker: Eric Cornell Starting from a weakly interacting Bose-Einstein condensate we quench suddenly to interactions which are formally infinite. The ensuing non-equilibrium evolution occurs over multiple timescales. We attempt to explain these observations in terms of the signatures of dilute, few-body physics that survive in the midst of a strongly interacting many-body system. [Preview Abstract] |
Thursday, May 26, 2016 11:00AM - 11:30AM |
N2.00002: Engineering Floquet Hamiltonians in Cold Atom Systems Invited Speaker: Anatoli Polkovnikov In this talk I will first give a brief overview of the Floquet theory, describing periodically driven systems. Then I will introduce the concept of the high-frequency expansion and will show how it generalizes the celebrated Schrieffer-Wolff transformation to driven systems. Using these tools I will illustrate how one can engineer non-trivial interacting Hamiltonians mostly in the context of cold atom systems and discuss some experimental examples. In the end I will talk about issues of heating and adiabaticity and show that there are very strong parallels between Floquet systems and disordered systems. In particular, I will argue that the heating transition is closely analogous to the many-body localization transition. [Preview Abstract] |
Thursday, May 26, 2016 11:30AM - 12:00PM |
N2.00003: Bottom-up approaches to quantum many-body physics with atoms Invited Speaker: Crystal Senko Quantum simulations, in which well-controlled collections of atoms are engineered to emulate an interacting quantum system of interest, will provide a powerful tool for studying many-body dynamics. In this talk, I discuss two promising platforms for this goal. First, I briefly describe experiments wherein tunable, long-range spin-spin interactions are implemented in chains of trapped atomic ions. This platform has enabled many sophisticated simulations of quantum magnetism, including, e.g., measurements of nonequilibrium dynamics in spin chains of 25 or more atoms. Next, I discuss approaches where individual neutral atoms in microtraps are positioned near photonic crystals, allowing for strong interactions between atoms and single photons. I describe progress toward deterministically generating photon-induced interactions between a pair of atoms, which will be a key ingredient for extending this system toward many-body physics. [Preview Abstract] |
Thursday, May 26, 2016 12:00PM - 12:30PM |
N2.00004: Quench dynamics in long-range interacting quantum systems Invited Speaker: Zhexuan Gong A distinctive feature of atomic, molecular, and optical systems is that interactions between particles are often long-ranged. Control techniques from quantum optics often allow one to tune the pattern of these long-range interactions, creating an entirely new degree of freedom, absent in typical condensed matter systems. These tunable long-range interactions can result in very different far-from-equilibrium dynamics compared to systems with only short-range interactions. In the first half of the talk, I will describe how very general types of long-range interactions can qualitatively change the entanglement and correlation growth shortly after a quantum quench. In the second half of the talk I will show that, at longer times, long-range interactions can lead to exotic quasi-stationary states and dynamical phase transitions. These theoretical ideas have been explored in recent trapped-ion experiments, and connections to these experiments will be emphasized in both parts of the talk. [Preview Abstract] |
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