PIRSA:10100067

Singular gauges and dS invariance of the graviton vacuum

Marolf, D. (2010). Singular gauges and dS invariance of the graviton vacuum. Perimeter Institute. https://pirsa.org/10100067

Marolf, Donald. Singular gauges and dS invariance of the graviton vacuum. Perimeter Institute, Oct. 27, 2010, https://pirsa.org/10100067 

          @misc{ pirsa_PIRSA:10100067,
            doi = {10.48660/10100067},
            url = {https://pirsa.org/10100067},
            author = {Marolf, Donald},
            keywords = {Cosmology},
            language = {en},
            title = { Singular gauges and dS invariance of the graviton vacuum},
            publisher = {Perimeter Institute},
            year = {2010},
            month = {oct},
            note = {PIRSA:10100067 see, \url{https://pirsa.org}}
          }

Donald Marolf University of California, Santa Barbara

DOI 10.48660/10100067
Collection
Talk Type Conference
Subject

Abstract

There has been a long-running discussion as to whether free gravitons on dS have a dS-invariant state. On the one hand, de Sitter invariant states are clearly singular in gauges favored by cosmologists; e.g. transverse traceless synchronous gauge associated with the k=0 slicing of dS. However, Higuchi has constructed a dS-invariant state using a different gauge. We resolve this tension by showing that the above “cosmologists gauge” is in fact singular on global de Sitter space. This observation may prove useful in understanding the physics of calculations indicating large IR effects involving gravity in dS.