BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//talks.cam.ac.uk//v3//EN
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19700329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19701025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CATEGORIES:Theory of Condensed Matter
SUMMARY:Non-equilibrium dynamics of open quantum system -
Dr Igor Lesanovsky\, University of Nottingham
DTSTART;TZID=Europe/London:20131010T141500
DTEND;TZID=Europe/London:20131010T154500
UID:TALK46810AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/46810
DESCRIPTION:In the talk I will give an overview of our recent
work on the non-equilibrium dynamics of open many-
body quantum systems. These systems are described
by a quantum Master equation of Lindblad form. To
characterise their non-equilibrium properties we m
ake use of the unravelling of the dynamics in term
s of stochastic quantum jump trajectories. To clas
sify dynamical phases we introduce as a dynamical
order parameter the number of quantum jumps in a s
pecific time interval. This approach rather natura
lly leads to a framework (called the s-ensemble) t
hat permits an understanding of the non-equilibriu
m phase structure from a perspective that is very
similar to that of equilibrium statistical mechani
cs. I will first demonstrate the approach for a dr
iven three-level atom diplaying intermittency in i
ts quantum jumps which is controlled by the drivin
g fields. Then I will discuss a dissipative versio
n of the quantum Ising model where such intermitte
ncy occurs as well but unlike in the previous case
is a genuine many-body effect. Finally\, I will f
ocus on a strongly interacting many-body system wi
th kinetic constraints that can be realised with c
old excited atoms. This system displays a dynamica
l transition which is not accompanied by a change
in the stastics. This feature results in non-trivi
al and strongly correlated relaxation behaviour wh
ich is reminiscent of glasses.\n
LOCATION:TCM Seminar Room\, Cavendish Laboratory
CONTACT:Gareth Conduit
END:VEVENT
END:VCALENDAR