Bulletin of the American Physical Society
80th Annual Meeting of the APS Southeastern Section
Volume 58, Number 17
Wednesday–Saturday, November 20–23, 2013; Bowling Green, Kentucky
Session CC: Invited Session on Atomic, Molecular, Optical
11:00 AM–1:24 PM,
Thursday, November 21, 2013
Chair: John Yukich, Davidson College
Abstract ID: BAPS.2013.SES.CC.3
Abstract: CC.00003 : Investigations of quantum pendulum dynamics in a spin-1 Bose-Einstein condensate*
12:12 PM–12:48 PM
Preview Abstract Abstract
(Georgia Institute of Technology)
An inverted pendulum at rest is a prototype of unstable equilibrium and corresponds to a hyperbolic fixed point in the dynamical phase space. While mechanical pendulums operating at the quantum limit are currently unavailable in the lab, it is possible to study ultracold atomic many-body systems that have similar dynamical behavior. In this talk, I will describe our recent measurements of the non-equilibrium dynamics of a spin-1 Bose-Einstein condensate ``pendulum'' initialized to the hyperbolic fixed point of the phase space by quenching the system. Subsequent evolution of the quantum fluctuations lead to spin squeezing and non-Gaussian probability distributions that are in good agreement with exact quantum calculations. Additionally, we have demonstrated stabilization of the non-equilibrium dynamics by periodic application of phase shifts to the collective states of the system. These experiments demonstrate new methods of manipulating out-of-equilibrium quantum many-body systems, drawing together ideas from classical Hamiltonian dynamics and quantum squeezing of collective states.
*We acknowledge support from the NSF for this work.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.SES.CC.3
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