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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20190624T192755Z
LAST-MODIFIED:20171023T160747Z
DTSTART:20171108T160000Z
DTEND:20171108T170000Z
UID:event1850@bu.edu
URL:http://physics.bu.edu/events/show/1850
SUMMARY:"Instabilities of the Sachdev-Ye-Kitaev Model"
DESCRIPTION:Featuring Zhen Bi\, Pappalardo Fellow\, Massachusetts Institute
of Technology\nHosted by: Zhicheng Yang\n\nPart of the Condensed Matter Th
eory Seminar Series.\n\nThe Sachdev-Ye-Kitaev (SYK) model is an intriguing
0+1d strongly interacting disordered model of non-Fermi liquid states with
exact solution and possible holographic duality. In this talk\, I will cons
ider a series of perturbations on the SYK model. We show that the maximal c
haotic non-Fermi-liquid phase described by the ordinary SYK model has margi
nally relevant or irrelevant (depending on the sign of the coupling constan
ts) four-fermion perturbations allowed by symmetry. Changing the sign of on
e of these four-fermion perturbations leads to a continuous chaotic-nonchao
tic quantum phase transition of the system accompanied by a spontaneous tim
e-reversal symmetry breaking. We also studied a generalized 0+1d interactin
g disordered fermion model which has a series of new fixed points with cont
inuously varying exponents. If time permits\, I will talk about a 1+1d mode
l built out of SYK clusters\, which exhibits a continuous transition betwee
n thermal metal and insulator phase at low temperature.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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