52 citations · 172 across the 6 of their papers we have counts for
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gr-qc2016★ 10 cited
The Sorkin-Johnston State in a Patch of the Trousers Spacetime
Michel Buck, Fay Dowker, Ian Jubb +1
A quantum scalar field in a patch of a fixed, topology-changing, dimensional "trousers" spacetime is studied using the Sorkin-Johnston formalism. The isometry group of the pa…
gr-qc2015★ 23 cited
Boundary Terms for Causal Sets
Michel Buck, Fay Dowker, Ian Jubb +1
We propose a family of boundary terms for the action of a causal set with a spacelike boundary. We show that in the continuum limit one recovers the Gibbons-Hawking-York boundary t…
gr-qc2013★ 12 cited
A preferred ground state for the scalar field in de Sitter space
Siavash Aslanbeigi, Michel Buck
We investigate a recent proposal for a distinguished vacuum state of a free scalar quantum field in an arbitrarily curved spacetime, known as the Sorkin-Johnston (SJ) vacuum, by ap…