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SUMMARY:Interacting Quantum Field Theory on a Causal Set - Stav Zalel\, U
 niversity of Cambridge
DTSTART:20250228T130000Z
DTEND:20250228T140000Z
UID:TALK228763@talks.cam.ac.uk
CONTACT:Xi Tong
DESCRIPTION:Causal set theory is an approach to quantum gravity in which s
 pacetime is fundamentally discrete at the Planck scale. In this theory\, s
 pacetime takes the form of a random Lorentzian lattice known as a "causal 
 set". In this talk\, I will describe recent developments in defining inter
 acting scalar quantum field theories on this novel background. I will pres
 ent diagrammatic rules for computing in-in correlators\; these rules are m
 anifestly causal thanks to the appearance of the retarded propagator.\nThi
 s framework is a step towards new quantum gravity phenomenology\, since it
  enables the computation of early universe observables under the assumptio
 n that spacetime is fundamentally discrete.
LOCATION:Potter room/Zoom: https://cam-ac-uk.zoom.us/j/83177386172?pwd=WMM
 Bb4K7LVPuZZZKAWyvDkKoQp711S.1
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