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The path integral formulation of energetic causal set models of the universe
Lee Smolin
I study several aspects of the path(st) integral we formulated in previous papers on energetic causal sets with Cortes and others. The focus here is on quantum field theories, incl…
Views, variety and celestial spheres
Lee Smolin
This paper describes a continuation of the program of causal views, in which the world consists of nothing but a vast number of partial views of its past. Each view is associated t…
The cosmology of minimal varying Lambda theories
Stephon Alexander, Marina Cortês, Andrew R. Liddle +3
Inserting a varying Lambda in Einstein's field equations can be made consistent with the Bianchi identities by allowing for torsion, without the need to add scalar field degrees of…
A Zero-Parameter Extension of General Relativity with Varying Cosmological Constant
Stephon Alexander, Marina Cortês, Andrew R. Liddle +3
We provide a new extension of general relativity (GR) which has the remarkable property of being more constrained than GR plus a cosmological constant, having one less free paramet…
Realism and Causality II: Retrocausality in Energetic Causal Sets
Eliahu Cohen, Marina Cortês, Avshalom C. Elitzur +1
We describe a new form of retrocausality, which is found in the behaviour of a class of causal set theories, called energetic causal sets (ECS). These are discrete sets of events,…
The quantum cosmological constant
Stephon Alexander, Joao Magueijo, Lee Smolin
We present an extension of general relativity in which the cosmological constant becomes dynamical and turns out to be conjugate to the Chern-Simons invariant of the Ashtekar conne…