BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260816T055919Z
LAST-MODIFIED:20130211T150427Z
DTSTART:20130301T170000Z
DTEND:20130301T180000Z
UID:event1002@bu.edu
URL:http://physics.bu.edu/internal/events/show/1002
SUMMARY:Quantum quench in p+ip superfluids:  Non-equilibrium topological ga
	pless state(s) 
DESCRIPTION:Featuring Matt Foster\, Rice University\nHosted by: Richard Ave
	ritt\n\nPart of the Biophysics/Condensed Matter Seminar Series.\n\nABSTRACT
	:\n\nGround state "topological protection" has emerged as a main theme in\n
	quantum condensed matter physics.  A key question is the robustness of\nphy
	sical properties including topological quantum numbers to\nperturbations su
	ch as disorder or non-equilibrium driving. In this\nwork we investigate the
	 dynamics of a p+ip superfluid following a zero\ntemperature quantum quench
	. The model describes a 2D topological\nsuperconductor with a non-trivial (
	trivial) BCS (BEC) phase. Proposed\nexperimental realizations include ultra
	cold atomic and molecular\ngases. We work with the full interacting BCS Ham
	iltonian\, which we\nsolve exactly in the thermodynamic limit using Liouvil
	le\nintegrability. The non-equilibrium phase diagram is obtained for\ngener
	ic quenches.  A large region of the phase diagram describes\nstrong to weak
	-pairing quenches wherein the order parameter vanishes\nin the long-time li
	mit\, due to pair fluctuations. Despite this\, we\nfind that the pseudospin
	 winding number survives for quenches in this\nregime\, leading to the pred
	iction of a "gapless topological" state.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR