134 citations · 491 across the 8 of their papers we have counts for
13 papers · 1 filter
Discreteness and the transmission of light from distant sources
Fay Dowker, Joe Henson, Rafael Sorkin
We model the classical transmission of a massless scalar field from a source to a detector on a background causal set. The predictions do not differ significantly from those of the…
Is the cosmological "constant" a nonlocal quantum residue of discreteness of the causal set type?
Rafael D. Sorkin
The evidence for an accelerating Hubble expansion appears to have confirmed the heuristic prediction, from causal set theory, of a fluctuating and ``ever-present'' cosmological ter…
Discreteness without symmetry breaking: a theorem
Luca Bombelli, Joe Henson, Rafael D. Sorkin
This paper concerns sprinklings into Minkowski space (Poisson processes). It proves that there exists no equivariant measurable map from sprinklings to spacetime directions (even l…
The Random Walk in Generalized Quantum Theory
Xavier Martin, Denjoe O'Connor, R. D. Sorkin
One can view quantum mechanics as a generalization of classical probability theory that provides for pairwise interference among alternatives. Adopting this perspective, we ``quant…
Quantum Gravity Phenomenology, Lorentz Invariance and Discreteness
Fay Dowker, Joe Henson, Rafael D. Sorkin
Contrary to what is often stated, a fundamental spacetime discreteness need not contradict Lorentz invariance. A causal set's discreteness is in fact locally Lorentz invariant, and…
Causal Sets: Discrete Gravity (Notes for the Valdivia Summer School)
Rafael D. Sorkin
These are lecture notes on causal set theory prepared in Jan. 2002 for a Summer School in Valdivia, Chile. In some places, they are more complete, in others much less so, regrettab…