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SUMMARY:Keiichiro Furuya (Purdue University)
DTSTART:20220816T193000Z
DTEND:20220816T203000Z
DTSTAMP:20260423T005717Z
UID:HET/36
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/36/">An 
 Algebra of Observables for de Sitter Space</a>\nby Keiichiro Furuya (Purdu
 e University) as part of Purdue HET\n\n\nAbstract\nIn this talk\, I will r
 eview the latest paper\, ``An Algebra of Observables for de Sitter Space
 ’’.  Since Bekenstein studied the entropy associated with the black ho
 le\, the studies of the entropic structure of a system with gravity have b
 een developed. Especially\, the (entanglement) entropy of a quantum system
  of two different regions is important to explore the correlations in a sy
 stem. In a quantum mechanical system\,  the (entanglement) entropy is a pr
 operty of the states of a given system. In quantum field theory\, it is in
 stead the property of the algebra of quantum field theory associated with 
 a subregion of spacetime\, which we now call the local algebra. In particu
 lar\, the ultraviolet divergence is due to the property of the local algeb
 ra. Hence\, understanding the entropic structure of quantum field theory r
 equires you to investigate the structure of a local algebra. This paper sp
 ecifies the properties of the local algebra of quantum field theory in de 
 Sitter space to seek its entropy.\n
LOCATION:https://researchseminars.org/talk/HET/36/
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