Imperial College London
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Claudia de Rham

Faculty of Natural Sciences, Department of Physics

Professor of Theoretical Physics
 
 
 
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Contact

 

c.de-rham CV

 
 
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Location

 

H506Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{de:2018:10.1103/PhysRevLett.121.221101,
author = {de, Rham C and Melville, S},
doi = {10.1103/PhysRevLett.121.221101},
journal = {Physical Review Letters},
pages = {1--6},
title = {Gravitational rainbows: LIGO and dark energy at its cutoff},
url = {http://dx.doi.org/10.1103/PhysRevLett.121.221101},
volume = {121},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The recent direct detection of gravitational waves from a neutron star merger with optical counterpart has been used to severely constrain models of dark energy that typically predict a modification of the gravitational wave speed. However, the energy scales observed at LIGO, and the particular frequency of the neutron star event, lie very close to the strong coupling scale or cutoff associated with many dark energy models. While it is true that at very low energies one expects gravitational waves to travel at a speed different than light in these models, the same is no longer necessarily true as one reaches energy scales close to the cutoff. We show explicitly how this occurs in a simple model with a known partial UV completion. Within the context of Horndeski, we show how the operators that naturally lie at the cutoff scale can affect the speed of propagation of gravitational waves and bring it back to unity at LIGO scales. We discuss how further missions including LISA and PTAs could play an essential role in testing such models.
AU  - de,Rham C
AU  - Melville,S
DO  - 10.1103/PhysRevLett.121.221101
EP  - 6
PY  - 2018///
SN  - 0031-9007
SP  - 1
TI  - Gravitational rainbows: LIGO and dark energy at its cutoff
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.121.221101
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000451339300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.221101
UR  - http://hdl.handle.net/10044/1/74614
VL  - 121
ER  -
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