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TT: Fachverband Tiefe Temperaturen

TT 56: Focus Session: Recent Progresses in Criticality in the Presence of Boundaries and Defects II (joint session DY/TT)

Wednesday, March 20, 2024, 15:00–16:15, A 151

In recent years there has been a renewed interest in critical systems in the presence of boundaries or, more generally, defects. This attention is driven by different perspectives. Numerical studies of quantum spin models have reported in some cases unexpected boundary critical behavior. This, in turns, has led to a reconsideration of the classical surface critical behavior problem, with the discovery of so-far overlooked boundary phases. In this context, numerous recent studies have considered the so-called symmetry-protected topological gapless systems, and in particular their boundary states. At the same time, advances in conformal field theory, specifically the conformal bootstrap program, have addressed the problem of boundaries and defects in conformally-invariant theories. This Focus Session brings together some of the main actors in the aforementioned advancements in boundary critical phenomena.

Organized by Francesco Parisen Toldin (Aachen) and Stefan Wessel (Aachen)

	15:00	TT 56.1	Invited Talk: Conformal boundary conditions of symmetric quantum critical states — •Long Zhang
	15:30	TT 56.2	Universal fragility of spin-glass ground-states under single bond changes — Mutian Shen, Gerardo Ortiz, Yang-Yu Liu, •Martin Weigel, and Zohar Nussinov
	15:45	TT 56.3	Random Matrices and the Free Energy of Ising-Like Models with Disorder — •Nils Gluth, Thomas Guhr, and Fred Hucht
	16:00	TT 56.4	The Griffiths phase and beyond: a large deviations study — •Lambert Münster, Alexander K. Hartmann, and Martin Weigel