PIRSA:15040111

Lessons from QuantumLand

Ribeiro, R. (2015). Lessons from QuantumLand. Perimeter Institute. https://pirsa.org/15040111

Ribeiro, Raquel. Lessons from QuantumLand. Perimeter Institute, Apr. 11, 2015, https://pirsa.org/15040111 

          @misc{ pirsa_PIRSA:15040111,
            doi = {10.48660/15040111},
            url = {https://pirsa.org/15040111},
            author = {Ribeiro, Raquel},
            keywords = {Cosmology},
            language = {en},
            title = {Lessons from QuantumLand},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {apr},
            note = {PIRSA:15040111 see, \url{https://pirsa.org}}
          }

Raquel Ribeiro Queen Mary - University of London (QMUL)

DOI 10.48660/15040111
Collection
Talk Type Conference
Subject

Abstract

Theories with large kinetic interactions have very relevant phenomenological applications in cosmology, in particular in the context of cosmic acceleration. Their Effective Field Theory (EFT) description relies on the so-called Vainshtein effect being operative. When incorporated at the quantum level, this mechanism ensures the validity of the theory in a non-trivial way. I will discuss how to estimate the regime of validity of such EFTs on the basis of computing the quantum corrections to the classical theory. I will point out how some lessons learned from the study of quantum effects in these theories might help us to tackle the significance of superluminalities and revisit what properties a healthy EFT should have.