Spacetime entanglement entropy: covariance and discreteness
A Mathur, S Surya, X Nomaan - General Relativity and Gravitation, 2022 - Springer
We review some recent results on Sorkin's spacetime formulation of the entanglement
entropy (SSEE) for a free quantum scalar field both in the continuum and in manifold-like …
entropy (SSEE) for a free quantum scalar field both in the continuum and in manifold-like …
Path integral suppression of badly behaved causal sets
Causal set theory is a discrete model of spacetime that retains a notion of causal structure.
We understand how to construct causal sets that approximate a given spacetime, but most …
We understand how to construct causal sets that approximate a given spacetime, but most …
Causal sets and an emerging continuum
S Carlip - General Relativity and Gravitation, 2024 - Springer
Causal set theory offers a simple and elegant picture of discrete physics. But the vast
majority of causal sets look nothing at all like continuum spacetimes, and must be excluded …
majority of causal sets look nothing at all like continuum spacetimes, and must be excluded …
The Einstein-Hilbert action for entropically dominant causal sets
In the path integral formulation of causal set quantum gravity, the quantum partition function
is a phase-weighted sum over locally finite partially ordered sets, which are viewed as …
is a phase-weighted sum over locally finite partially ordered sets, which are viewed as …
Computer simulations of causal sets
L Glaser - Handbook of Quantum Gravity, 2023 - Springer
Abstract This review introduces Markov Chain Monte Carlo simulations in causal set theory,
with a focus on the study of the 2d orders. It will first introduce the Benincasa-Dowker action …
with a focus on the study of the 2d orders. It will first introduce the Benincasa-Dowker action …
The Causal Set Approach to the Problem of Quantum Gravity
Causal set theory (CST) is an approach to the problem of quantum gravity based on the twin
hypotheses of fundamental spacetime discreteness and primitivity of the spacetime causal …
hypotheses of fundamental spacetime discreteness and primitivity of the spacetime causal …
Timelike boundary and corner terms in the causal set action
F Dowker, R Liu, D Lloyd-Jones - arXiv preprint arXiv:2501.00139, 2024 - arxiv.org
The causal set action of dimension $ d $ is investigated for causal sets that are Poisson
sprinklings into submanifolds of $ d $-dimensional Minkowski space. Evidence, both analytic …
sprinklings into submanifolds of $ d $-dimensional Minkowski space. Evidence, both analytic …
Aspects of quantum fields on causal sets
X Nomaan - 2021 - arxiv.org
We study some kinematical aspects of quantum fields on causal sets. In particular, we are
interested in free scalar fields on a fixed background causal set. We present various results …
interested in free scalar fields on a fixed background causal set. We present various results …
Toward the Emergence of Continuum Spacetime in Causal Set Theory
A Mathur - Handbook of Quantum Gravity, 2024 - Springer
In causal set theory (CST), the continuum spacetime manifold is postulated to be a low-
energy approximation of a more fundamental discrete sub-structure of a locally finite partial …
energy approximation of a more fundamental discrete sub-structure of a locally finite partial …