COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > Cosmology Lunch > A Local Wheeler-DeWitt Measure for the String Landscape

## A Local Wheeler-DeWitt Measure for the String LandscapeAdd to your list(s) Download to your calendar using vCal - Arthur Hebecker - University of Heidelberg
- Monday 31 October 2022, 13:00-14:00
- CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].
If you have a question about this talk, please contact Francesco. Zoom link: https://zoom.us/j/92882660222. According to the `Cosmological Central Dogma’, de Sitter space can be viewed as a quantum mechanical system with a finite number of degrees of freedom, set by the horizon area. I will discuss how this assumption, together with the Wheeler-DeWitt (WDW) equation, can be used to approach the measure problem of eternal inflation. It turns out that one is searching for a time-independent wave function of the universe on a total Hilbert space defined as the direct sum of a variety of subspaces: A finite-dimensional subspace for each de Sitter vacuum and an infinite-dimensional subspace for each terminal Minkowski or AdS vaccuum. I will argue that, to be consistent with semiclassical intuition, such a solution requires the presence of sources. These are implemented as an inhomogenous term in the WDW equation, induced by the Hartle-Hawking no-boundary or the Linde/Vilenkin tunneling proposal. Taken together, these steps unambiguously lead to what we would like to think of as a `Local WDW measure,’ where `local’ refers to the fact that the dS part of the resulting wave function describes a superposition of static patches. The global multiverse geometry makes no explicit appearance. This talk is part of the Cosmology Lunch series. ## This talk is included in these lists:- All CMS events
- CMS Events
- CMS, Pav. B, CTC Common Room (B1.19) [Potter Room]
- Cosmology Lunch
- Cosmology lists
- Cosmology, Astrophysics and General Relativity
- DAMTP info aggregator
- Interested Talks
- Kavli Institute for Cosmology Talk Lists
- Priscilla
- bld31
Note that ex-directory lists are not shown. |
## Other listscustom Psych CU Social Anthropology Society## Other talksCoffee in Godwin The History of Liquid Metal Batteries Where do black holes in binaries come from? Biographies of the stellar graveyard Antagonistic microbial community processes demarcate different pulmonary exacerbation types in Cystic Fibrosis TBA Discussion and Summary |