BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Black holes in grand canonical ensemble DTSTART:20220421T143000Z DTEND:20220421T160000Z DTSTAMP:20260905T111936Z UID:37cc304a-67bc-4ae4-ae66-26e1760f719f SEQUENCE:1 CREATED:20220413T103900Z DESCRIPTION:ABSTRACT: From the successful works of Bekenstein and Hawking\ , it is known that black holes are thermodynamic objects. In particular\, black holes emit particles as a black body at the Hawking temperature\, an d have a precise entropy\, the Bekenstein-Hawking entropy. The nature of t he entropy of a black hole is still an open problem\, a possible explanati on may lie on a theory of quantum gravity. In this seminar\, I will talk a bout the construction of the canonical and grand canonical ensemble for bl ack hole spacetimes using the path integral approach to quantum gravity. S uch ensembles determine the thermodynamics of a black hole from a semiclas sical approximation of the quantum theory. The seminar is planned as follo ws: (i) I will summarize previous works\, from Gibbons and Hawking\, to Yo rk and André and Lemos\; (ii) I will then describe the results of my curr ent work on the grand canonical ensemble of d-dimensional ReissnerNordstr öm black holes in a cavity and compare them to the case of a charged cond ucting sphere in flat d-dimensional spacetime in a cavity. LAST-MODIFIED:20220413T103900Z LOCATION:Sala de Seminários do DF\, Pavilhão de Física\, 2º piso URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/black-holes-in-grand-canon ical-ensemble/ X-ALT-DESC;FMTTYPE=text/html:

ABSTRACT: From the successful works of Bekenstein and Hawking\, it is known that black holes are thermodynamic objects. In particular\, black holes emit particles as a black body at the Hawking temperature\, and have a precise entropy\, the Bekenstein-Hawking entropy. The nature of the entropy of a black hole is s till an open problem\, a possible explanation may lie on a theory of quant um gravity. In this seminar\, I will talk about the construction of the ca nonical and grand canonical ensemble for black hole spacetimes using the p ath integral approach to quantum gravity. Such ensembles determine the the rmodynamics of a black hole from a semiclassical approximation of the quan tum theory. The seminar is planned as follows: (i) I will summarize previo us works\, from Gibbons and Hawking\, to York and André and Lemos\; (ii) I will then describe the results of my current work on the grand canonical ensemble of d-dimensional ReissnerNordström black holes in a cavity and compare them to the case of a charged conducting sphere in flat d-dimensio nal spacetime in a cavity.

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