CMSP Seminar Series @ICTP Stasi, Thursday 20 September at 11am - Mikhail V. FEIGELMAN

CM Section cm at
Mon Sep 17 18:27:51 CEST 2018

ICTP Seminar Series in Condensed Matter and Statistical Physics

Thursday 20 September at 11:00 a.m.

Luigi Stasi Seminar Room, first floor, ICTP Leonardo building

Speaker: Mikhail V. FEIGELMAN
Landau Institute for Theoretical Physics, Russia

'SYK Model with Quadratic Perturbations: The Route to a

We study stability of the SYK_4 model with a large but finite number
of fermions N with respect to a perturbation, quadratic in fermionic
operators. We develop  analytic perturbation theory in the amplitude
of the SYK_2 perturbation and demonstrate stability of the SYK_4
infra-red asymptotic behavior characterized by a Green function
G(t) µ 1/t^3/2 , with respect to weak  perturbation. This result is 
by exact numerical diagornalization.  Our results open the way to
build a theory of non-Fermi-liquid states of strongly interacting fermions.

A. V. Lunkin 
K. S. Tikhonov 
M. V. Feigel'man 

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