New action for cosmology

Sloan, David (2021) New action for cosmology. Physical Review D, 103 (4). ISSN 1550-7998

Text (NewAction)
NewAction.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial.

Download (332kB)


We present a new action which reproduces the cosmological sector of general relativity in both the Friedmann-Lemaître-Robertson-Walker and Bianchi models. This action makes no reference to the scale factor and is of a frictional type first examined by Herglotz. We demonstrate that the extremization of this action reproduces the usual dynamics of physical observables, and the symplectification of this action is the Einstein-Hilbert action for cosmological models. We end by discussing some of the increased explanatory power produced by considering the reduced physical ontology resulting from eliminating scale.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
© 2021 American Physical Society
ID Code:
Deposited By:
Deposited On:
26 Jan 2021 14:45
Last Modified:
15 Jan 2023 02:19