Bulletin of the American Physical Society
APS March Meeting 2014
Volume 59, Number 1
Monday–Friday, March 3–7, 2014; Denver, Colorado
Session B32: Invited Session: Thermalization and Prethermalization in Isolated Systems after a Quantum Quench
11:15 AM–2:15 PM,
Monday, March 3, 2014
Sponsoring Units: DCMP DAMOP
Chair: Michael Kolodrubetz, Boston University
Abstract ID: BAPS.2014.MAR.B32.2
Abstract: B32.00002 : Universal dynamics of a degenerate unitary Bose gas*
11:51 AM–12:27 PM
Preview Abstract Abstract
It has long been thought that one can not study a degenerate Bose gas with fully resonant (unitary) interactions because the gas is unstable to three-body recombination. We find empirically instead that after a Bose-Einstein condensate has been tuned from a weakly interacting state to a fully unitary gas at the peak of a Feshbach resonance, it survives for a time long enough to permit the characterization momentum-population dynamics. In particular, a high momentum tail forms and comes to a quasi-steady state in perhaps 100 microseconds, while the sample continues to survive and indeed remains degenerate for considerably longer. We show that the shape- and time-dependence of the momentum distribution scale in a universal way with sample density. This work was done in collaboration with Phil Makotyn, Deborah Jin, Cathy Klauss and David Goldberger.
*This work was supported by NSF, ONR and NIST.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.MAR.B32.2
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