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PRODID:-//Grails iCalendar plugin//NONSGML Grails iCalendar plugin//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260415T111153Z
DTSTART;TZID=Europe/London:20231003T130000
DTEND;TZID=Europe/London:20231003T150000
SUMMARY:“Cosmic Acceleration as a Quantum Gravity Effect”
UID:20260416T152850Z-iCalPlugin-Grails@philevents-web-f5d4878dd-x5n6c
TZID:Europe/London
DESCRIPTION:<p>Abstract: Bohmian quantum gravity is a non-classical geometrodynamics (in the ADM formalism) which describes the time evolution of a 3-geometry and of a matter field (or other matter degrees of freedom). One of the virtues of this theory is that it solves the problem of time of quantum gravity. The Bohmian dynamics also entails novel features compared to classical geometrodynamics (i.e.\, general relativity)\, such as singularity avoidance and the possibility of accelerated expansion as a quantum effect. We will consider the latter in a simplified model of quantum gravity using a mini-superspace description of an isotropic and homogeneous universe with dust. We derive the modified Friedmann equations for the scale factor\, which now contain a dependence on the wave function. We identify wave functions for which the quantum effects lead to a period of accelerated expansion that is in agreement with the apparent evolution of our universe\, without introducing a cosmological constant.</p>
ORGANIZER;CN=Jacob Barandes:
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