Quantization and topology: SL(2,R)-de Sitter invariant fields in two dimensions
2020 ◽
Vol 35
(02n03)
◽
pp. 2040018
Keyword(s):
We explore the interplay between quantization, local commutativity and the analyticity properties of the two-point functions of a quantum field in a non trivial topological cosmological background in the example of the two-dimensional de Sitter manifold and its double covering. The global topological differences make the many of the well-known features of de Sitter quantum field theory disappear. In particular there is nothing like a Bunch-Davies vacuum and there are no [Formula: see text]-invariant fields whose mass is less than 1/2.
1990 ◽
Vol 83
(5)
◽
pp. 941-952
◽
Keyword(s):
2020 ◽
pp. 78-85
Keyword(s):
1990 ◽
Vol 83
(6)
◽
pp. 1126-1139
◽
Keyword(s):
Keyword(s):
1998 ◽
Vol 196
(3)
◽
pp. 535-570
◽
Keyword(s):
Keyword(s):