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Title: Entropy and the link action in the causal set path-sum
Authors: Mathur, Abhishek
Singh, Anup Anand
Surya, Sumati
Keywords: quantum gravity
causal set theory
partial orders
link action
Issue Date: Feb-2021
Publisher: IOP Publishing Ltd.
Citation: Classical and Quantum Gravity, 2021, Vol.38, 045017
Abstract: In causal set theory the gravitational path integral is replaced by a path-sum over a sample space Ωn of n-element causal sets. The contribution from nonmanifold- like orders dominates Ωn for large n and therefore must be tamed by a suitable action in the low energy limit of the theory. We extend the work of Loomis and Carlip on the contribution of sub-dominant bilayer orders to the causal set path-sum and show that the ‘link action’ suppresses the dominant Kleitman–Rothschild orders for the same range of parameters
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0264-9381
1361-6382 (Online)
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Copyright: 2021 IOP Publishing Ltd.
Additional information: Restricted Access
Appears in Collections:Research Papers (TP)

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