Scalar gravitational waves in the effective theory of gravity
Abstract
As a low energy effective field theory, classical General Relativity receives an infrared relevant modification from the conformal trace anomaly of the energymomentum tensor of massless, or nearly massless, quantum fields. The local form of the effective action associated with the trace anomaly is expressed in terms of a dynamical scalar field that couples to the conformal factor of the spacetime metric, allowing it to propagate over macroscopic distances. Linearized around flat spacetime, this semiclassical EFT admits scalar gravitational wave solutions in addition to the transversely polarized tensor waves of the classical Einstein theory. The amplitude of the scalar wave modes, as well as their energy and energy flux which are positive and contain a monopole moment, are computed. As a result, astrophysical sources for scalar gravitational waves are considered, with the excited gluonic condensates in the interiors of neutron stars in merger events with other compact objects likely to provide the strongest burst signals.
 Authors:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Publication Date:
 Research Org.:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org.:
 USDOE Laboratory Directed Research and Development (LDRD) Program
 OSTI Identifier:
 1398910
 Report Number(s):
 LAUR1623649
Journal ID: ISSN 10298479
 Grant/Contract Number:
 AC5206NA25396
 Resource Type:
 Journal Article: Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 7; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy and Astrophysics; Gravitational Waves; General Theory of Relativity; Conformal Anomaly; Anomalies in Field and String Theories; Models of Quantum Gravity; Effective Field Theories
Citation Formats
Mottola, Emil. Scalar gravitational waves in the effective theory of gravity. United States: N. p., 2017.
Web. doi:10.1007/JHEP07(2017)043.
Mottola, Emil. Scalar gravitational waves in the effective theory of gravity. United States. doi:10.1007/JHEP07(2017)043.
Mottola, Emil. Mon .
"Scalar gravitational waves in the effective theory of gravity". United States.
doi:10.1007/JHEP07(2017)043. https://www.osti.gov/servlets/purl/1398910.
@article{osti_1398910,
title = {Scalar gravitational waves in the effective theory of gravity},
author = {Mottola, Emil},
abstractNote = {As a low energy effective field theory, classical General Relativity receives an infrared relevant modification from the conformal trace anomaly of the energymomentum tensor of massless, or nearly massless, quantum fields. The local form of the effective action associated with the trace anomaly is expressed in terms of a dynamical scalar field that couples to the conformal factor of the spacetime metric, allowing it to propagate over macroscopic distances. Linearized around flat spacetime, this semiclassical EFT admits scalar gravitational wave solutions in addition to the transversely polarized tensor waves of the classical Einstein theory. The amplitude of the scalar wave modes, as well as their energy and energy flux which are positive and contain a monopole moment, are computed. As a result, astrophysical sources for scalar gravitational waves are considered, with the excited gluonic condensates in the interiors of neutron stars in merger events with other compact objects likely to provide the strongest burst signals.},
doi = {10.1007/JHEP07(2017)043},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2017,
place = {United States},
year = {Mon Jul 10 00:00:00 EDT 2017},
month = {Mon Jul 10 00:00:00 EDT 2017}
}
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