Citation

BibTex format

@article{de:2020:10.1103/PhysRevD.102.084048,
author = {de, Rham C and Tolley, AJ},
doi = {10.1103/PhysRevD.102.084048},
journal = {PHYSICAL REVIEW D},
pages = {1--33},
title = {Causality in curved spacetimes: The speed of light and gravity},
url = {http://dx.doi.org/10.1103/PhysRevD.102.084048},
volume = {102},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Within the low-energy effective field theories of quantum electrodynamics and gravity, the low-energy speed of light or that of gravitational waves can typically be mildly superluminal in curved spacetimes. Related to this, small scattering time advances relative to the curved background can emerge from known effective field theory coefficients for photons or gravitons. We clarify why these results are not in contradiction with causality, analyticity or Lorentz invariance, and highlight various subtleties that arise when dealing with superluminalities and time advances in the gravitational context. Consistent low-energy effective theories are shown to self-protect by ensuring that any time advance and superluminality calculated within the regime of validity of the effective theory is necessarily unresolvable, and cannot be argued to lead to a macroscopically larger light cone. Such considerations are particularly relevant for putting constraints on cosmological and gravitational effective field theories and we provide explicit criteria to be satisfied so as to ensure causality.
AU  - de,Rham C
AU  - Tolley,AJ
DO  - 10.1103/PhysRevD.102.084048
EP  - 33
PY  - 2020///
SN  - 1550-7998
SP  - 1
TI  - Causality in curved spacetimes: The speed of light and gravity
T2  - PHYSICAL REVIEW D
UR  - http://dx.doi.org/10.1103/PhysRevD.102.084048
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000580363000002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.084048
UR  - http://hdl.handle.net/10044/1/87349
VL  - 102
ER  -
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