A remark on $\alpha$-vacua for quantum field theories on de Sitter space

Romeo Brunetti, Klaus Fredenhagen, Stefan Hollands
March 02, 2005
It is shown that the so-called $\alpha$-vacua which have been proposed as candidates for states of free quantum fields on de Sitter space have infinitely strong fluctuations for typical observables as averaged renormalized energy momentum tensor.
open access link JHEP0505:063,2005
@article{Brunetti:2005pr, author = "Brunetti, Romeo and Fredenhagen, Klaus and Hollands, Stefan", title = "{A Remark on alpha vacua for quantum field theories on de Sitter space}", journal = "JHEP", volume = "05", year = "2005", pages = "063", doi = "10.1088/1126-6708/2005/05/063", eprint = "hep-th/0503022", archivePrefix = "arXiv", primaryClass = "hep-th", reportNumber = "DESY-05-075", SLACcitation = "%%CITATION = HEP-TH/0503022;%%" }