[Fwd: SP Seminar 09.02.2016 @SISSA: Thessa Fokkema]

[Condensed_Matter_Group]

---------------------------- Original Message ----------------------------
Subject: SP Seminar 09.02.2016 @SISSA: Thessa Fokkema
From:    "Vincenzo Alba" <valba at sissa.it>
Date:    Sun, February 7, 2016 9:43 pm
To:      statistical_physics_seminar at lists.ictp.it
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JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR

Tuesday, 9th February - 11:00 a.m.

SISSA, room 128


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Speaker: Thessa Fokkema (University of Amsterdam)

Title: Supersymmetric lattice models: the field theory connection.

Abstract:

This talk is about a series of supersymmetric lattice models called
the Mk models. The focus will be on the M2 model on a one-dimensional
lattice. In this model a maximum of two neighbouring sites can be
occupied by spinless fermions. At the critical point the Mk model
corresponds to the k-th N=2 superconformal minimal model. By
introducing boundary defects on the lattice, all fields in the CFT can
be identified. The Mk models can be tuned off-criticality by a
staggering perturbation. For the right values of the staggering
parameters the Mk models are integrable. We find that the M2 model
perturbed by an integrable staggering corresponds to the
supersymmetric sine-Gordon model at the point where there is an
additional N=2 supersymmetry. In a limit of `extreme staggering? we
are able to compare the kinks in between the M2 model ground states to
the solitons of the supersymmetric sine-Gordon model.