Fwd: SP seminar 24.11.2015 @SISSA: Ian Affleck

[Condensed Matter Section]

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR

Tuesday, 24th November - 11:00 am

SISSA, room 128


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Speaker: Ian Affleck (University of British Columbia)

Title: Entanglement and the Kondo Problem

Abstract:  The 2-channel Kondo model has a non-Fermi liquid ground state
with a degeneracy of g=square root of 2. Following a prediction of
Calabrese and Cardy, ln g is expected to appear as a term in the
entanglement entropy. The Kondo model also exhibits an exponentially large
"screening cloud".  I will present an intuitive picture in terms of
resonating valence bonds, and numerical evidence from DMRG,  for how both
ln g and the screening cloud size show up in the entanglement entropy.

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Vincenzo



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