31 citations · 95 across the 7 of their papers we have counts for
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S-matrix in de Sitter spacetime from general boundary quantum field theory
Daniele Colosi
A new quantization scheme for a massive scalar field in de Sitter spacetime is proposed, based on the general boundary formulation of quantum field theory. We show that the general…
On the structure of the vacuum state in general boundary quantum field theory
Daniele Colosi
We quantize a real massive Klein-Gordon field in curved spacetimes within the general boundary formulation. The vacuum wave function is given by a Gaussian in the Schrödinger repre…
States and amplitudes for finite regions in a two-dimensional Euclidean quantum field theory
Daniele Colosi, Robert Oeckl
We quantize the Helmholtz equation (plus perturbative interactions) in two dimensions to illustrate a manifestly local description of quantum field theory. Using the general bounda…
Spatially asymptotic S-matrix from general boundary formulation
Daniele Colosi, Robert Oeckl
We construct a new type of S-matrix in quantum field theory using the general boundary formulation. In contrast to the usual S-matrix the space of free asymptotic states is located…
S-matrix at spatial infinity
Daniele Colosi, Robert Oeckl
We provide a new method to construct the S-matrix in quantum field theory. This method implements crossing symmetry manifestly by erasing the a priori distinction between in- and o…