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SUMMARY:Rate of cluster decomposition via Fermat point
DTSTART;VALUE=DATE-TIME:20190222T170000Z
DTEND;VALUE=DATE-TIME:20190222T171500Z
DTSTAMP;VALUE=DATE-TIME:20241010T094941Z
UID:indico-contribution-117@mosphys.ru
DESCRIPTION:Speakers: Lev Astrakhantsev (MIPT\, ITEP)\nIn quantum field th
eory with a mass gap correlation function between two spatially separated
operators decays exponentially with the distance. This fundamental result
immediately implies an exponential suppression of all higher point correla
tion functions\, but the predicted exponent is not optimal. We argue that
in a general quantum field theory the optimal suppression of a three-point
function is determined by total distance from the operator locations to t
he Fermat point. Similarly\, for the higher point functions we conjecture
the optimal exponent is determined by the solution of the Euclidean Steine
r tree problem. We discuss how our results constrain operator spreading in
relativistic theories.\n\nhttps://rich2018.org/indico/event/2/contributio
ns/117/
LOCATION:HSE Study Center “Voronovo”
URL:https://rich2018.org/indico/event/2/contributions/117/
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