Video URL
https://pirsa.org/15120012Experimental Probes of Vacuum Energy
APA
(2015). Experimental Probes of Vacuum Energy. Perimeter Institute for Theoretical Physics. https://pirsa.org/15120012
MLA
Experimental Probes of Vacuum Energy. Perimeter Institute for Theoretical Physics, Dec. 15, 2015, https://pirsa.org/15120012
BibTex
@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}} }
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.