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SUMMARY:Quantum gravity at low-energy: How? Where? Why?
DTSTART:20260401T123000Z
DTEND:20260401T140000Z
DTSTAMP:20260510T042800Z
UID:indico-event-51070@agenda.infn.it
DESCRIPTION:Speakers: Federico Piazza (Marseille\, CPT)\n\nQuantum gravita
 tional effects are commonly associated to UV physics. However\, deviations
  from classical General Relativity could be at play also within the low en
 ergy theory\, if the wavefunction of the metric presents features (typical
 ly\, a large width) that cannot be captured by a classical solution. These
  macroscopic deviations from classicality impact measurements and observat
 ions made inside the spacetime\, e.g. by a set of free falling observers. 
 The latter can effectively be used to define a frame. I will show that the
  average distances between the events in this frame are not the geodesic d
 istances of any metric and portray an interesting ``average causal structu
 re” that has no classical analogue. At the same time\, coordinate transf
 ormations between frames become probabilistic in the presence of these met
 ric fluctuations. As an example I will consider the 1+1 dimensional model 
 of JT gravity and discuss different localization in that framework. Finall
 y\, I will show how low-energy quantum gravitational effects can help reso
 lving spacetime singularities.\n\nhttps://agenda.infn.it/event/51070/
LOCATION:Aula Majorana (Dip. di Fisica - Edificio G. Marconi)
URL:https://agenda.infn.it/event/51070/
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