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SUMMARY:Soft modes\, boundary symmetries\, and relational entanglement in 
 gauge theories
DTSTART:20260318T130000Z
DTEND:20260318T143000Z
DTSTAMP:20260419T023800Z
UID:indico-event-13394@indico.ijclab.in2p3.fr
CONTACT:jacopo.mazza@ijclab.in2p3.fr
DESCRIPTION:Speakers: Francesco Sartini (Okinawa Institute of Science and 
 Technology)\n\nSoft modes and boundary degrees of freedom play an importan
 t role in quantum gravity\, gauge theory\, holography\, and scattering amp
 litudes\, yet their treatment in asymptotic regimes and finite subregions 
 is often disconnected. In this talk\, I present a framework that connects 
 these perspectives using a relational description. The key idea is to inte
 rpret the so-called edge modes as dynamical reference frames built from dy
 namical fields. This viewpoint separates intrinsic frames from extrinsic o
 nes\, describing how a region is embedded in the rest of the system. The e
 xtrinsic sector universally extends the phase space through a gauge-invari
 ant corner Goldstone encoding physical symmetries\, which correspond to re
 orientations of the reference frame. Using Maxwell theory as an illustrati
 ve example\, I will show how this structure links asymptotic and finite re
 gion descriptions. At the quantum level\, it naturally factorizes the Hilb
 ert space and leads to well-defined\, distillable entanglement entropies. 
 In analogy with recent results in perturbative gravity\, this framework in
 trinsically regularizes gauge-theoretic entropies without introducing auxi
 liary Hilbert spaces. Different choices of reference frame generate a hier
 archy of relational operator algebras\, providing a unified perspective on
  soft physics\, boundary symmetries\, and subsystem information.\n\nhttps:
 //indico.ijclab.in2p3.fr/event/13394/
LOCATION:210/1-114 - Salle des Séminaires (IJCLab)
URL:https://indico.ijclab.in2p3.fr/event/13394/
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