BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Quantum quenches in the sine-Gordon model: a semiclassical approac
 h - Marton Kormos (Budapest University of Technology and Economics)
DTSTART:20160111T100000Z
DTEND:20160111T110000Z
UID:TALK64615@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Co-author: Gergely Zarand		(Budapest University of Technology 
 and Economics) <span><br><span><br>I will report results on the time evolu
 tion of correlation functions after quantum quenches in the sine-Gordon mo
 del computed using a semiclassical approach which is expected to yield acc
 urate results for small and slow quenches producing slow quasiparticles wi
 th low density. I will demonstrate this by showing that the method reprodu
 ces the results of a recent form factor calculation of the relaxation of e
 xpectation values. Extending these results\, the expectation values of mos
 t vertex operators will be shown not to decay to zero. I will give analyti
 c expressions for the relaxation of dynamic correlation functions to find 
 that they have diffusive behavior for large timelike separation. At the en
 d of my talk I will show preliminary results obtained with an improved "se
 mi-semiclassical" version of the method.</span></span>
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR