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:Geometric responses of Quantum Hall systems. Bulk
and boundary. - Alexander Abanov\, Stony Brook Uni
versity
DTSTART;TZID=Europe/London:20160204T141500
DTEND;TZID=Europe/London:20160204T151500
UID:TALK63802AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/63802
DESCRIPTION:The fractional quantum Hall effect (FQHE) is a fas
cinating physical phenomenon of quantization of th
e Hall conductance of two-dimensional electron gas
in terms of fundamental constants. The phenomenon
is observed at low temperatures and in strong mag
netic fields. It is characterized by a formation o
f a collective state of electrons — an incompressi
ble electron liquid. The responses of this rather
exotic fluid to external electromagnetic and elast
ic perturbations are rather geometric in nature. T
hese responses can be compactly described by the e
ffective action of FQHE. In this talk I will consi
der the geometric part of the effective action for
FQHE. It consists of three terms: Chern-Simons\,
Wen-Zee and gravitational Chern-Simons terms. I wi
ll show how to derive the geometric part of the ef
fective action and will discuss the physical meani
ng of the corresponding linear responses of FQHE.
In particular\, I will consider the role of framin
g anomaly in the theory of linear responses for FQ
HE and discuss manifestations of geometric terms o
n the boundary of FQHE droplet.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
CONTACT:Dr G Moller
END:VEVENT
END:VCALENDAR