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DTSTAMP:20190319T055014Z
UID:5c1a0edb2b131270544627@ist.ac.at
DTSTART:20190225T100000
DTEND:20190225T110000
DESCRIPTION:Speaker: Mitali Banerjee\nhosted by Georgios Katsaros\nAbstract
: Topological states of matter are characterized by topological invariants
\, which are physical quantities whose values are quantized and do not dep
end on details of the measured system. Among them the electrical Hall cond
uctance\, which is expressed inunits of (e^2)/h is easiest to probe. In th
e fractional quantum Hall effect regime\, fractional quantized values of t
he electrical Hall conductance attest to topologically ordered states\,whi
ch are states that carry quasi-particles with fractional charge and (expec
ted) anyonic statistics. Another topological invariant\, which is much har
der to measure\, is the thermalHall conductance\, KT\, expressed in units
of (\\kappa_0)T=[\\pi^2(k_B^2/3h)]TIn 1D transport it does not depend on t
he particles charge\, particles exchange statistics\, and is even insensit
ive to the interaction strength among the particles. A fractional value of
the quantized thermal Hall conductance shows that the probed state of mat
ter is non-abelian. Quasiparticles in nonabelian states may be useful for
topological quantum computation. In this talk\, I will report our measurem
ents of the thermal Hall conductance of the \\vau=5/2 state to be fraction
al\, implying non-abelian nature of the state.
LOCATION:Mondi Seminar Room 2\, Central Building\, IST Austria
ORGANIZER:tguggenb@ist.ac.at
SUMMARY:Quantization of heat flow in the fractional quantum Hall regime
URL:https://talks-calendar.app.ist.ac.at/events/1705
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