Video URL

https://pirsa.org/15120012

Experimental Probes of Vacuum Energy

(2015). Experimental Probes of Vacuum Energy. Perimeter Institute for Theoretical Physics. https://pirsa.org/15120012

Experimental Probes of Vacuum Energy. Perimeter Institute for Theoretical Physics, Dec. 15, 2015, https://pirsa.org/15120012 

          @misc{ scivideos_PIRSA:15120012,
            doi = {10.48660/15120012},
            url = {https://pirsa.org/15120012},
            author = {},
            keywords = {Particle Physics},
            language = {en},
            title = {Experimental Probes of Vacuum Energy},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {dec},
            note = {PIRSA:15120012 see, \url{https://scivideos.org/pirsa/15120012}}
          }
DOI 10.48660/15120012
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The vacuum energy changes when cosmological phase transitions take place, or in environments with high temperatures or chemical potentials.  The propagation of primordial gravity waves is affected through the trace anomaly, and eras where the vacuum energy dominates can lead tofeatures in the gravity wave spectrum.  High density phases of QCD in neutron stars, where the vacuum is rearranged, are also a novel probe:  The mass-radius relationships for neutron stars is sensitive to the equation of state appearing in the Einstein equations, which may depend on new dynamics associated with vacuum energy.  Such observations could potentially rule out large classes of explanations for the smallness of the currently observed cosmological constant.