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Title: Oscillons in higher-derivative effective field theories

Abstract

We investigate the existence and behavior of oscillons in theories in which higher derivative terms are present in the Lagrangian, such as Galileons. Such theories have emerged in a broad range of settings, from higher-dimensional models, to massive gravity, to models for late-time cosmological acceleration. By focusing on the simplest example—massive Galileon effective field theories—we demonstrate that higher derivative terms can lead to the existence of completely new oscillons (quasibreathers). We illustrate our techniques in the artificially simple case of 1 + 1 dimensions, and then present the complete analysis valid in 2 + 1 and 3 + 1 dimensions, exploring precisely how these new solutions are supported entirely by the nonlinearities of the quartic Galileon. These objects have the novel peculiarity that they are of the differentiability class C1.

Authors:
;
Publication Date:
Research Org.:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1485732
Alternate Identifier(s):
OSTI ID: 1612006
Grant/Contract Number:  
SC0013528
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 12; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics; Alternative gravity theories

Citation Formats

Sakstein, Jeremy, and Trodden, Mark. Oscillons in higher-derivative effective field theories. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.123512.
Sakstein, Jeremy, & Trodden, Mark. Oscillons in higher-derivative effective field theories. United States. https://doi.org/10.1103/PhysRevD.98.123512
Sakstein, Jeremy, and Trodden, Mark. Thu . "Oscillons in higher-derivative effective field theories". United States. https://doi.org/10.1103/PhysRevD.98.123512.
@article{osti_1485732,
title = {Oscillons in higher-derivative effective field theories},
author = {Sakstein, Jeremy and Trodden, Mark},
abstractNote = {We investigate the existence and behavior of oscillons in theories in which higher derivative terms are present in the Lagrangian, such as Galileons. Such theories have emerged in a broad range of settings, from higher-dimensional models, to massive gravity, to models for late-time cosmological acceleration. By focusing on the simplest example—massive Galileon effective field theories—we demonstrate that higher derivative terms can lead to the existence of completely new oscillons (quasibreathers). We illustrate our techniques in the artificially simple case of 1 + 1 dimensions, and then present the complete analysis valid in 2 + 1 and 3 + 1 dimensions, exploring precisely how these new solutions are supported entirely by the nonlinearities of the quartic Galileon. These objects have the novel peculiarity that they are of the differentiability class C1.},
doi = {10.1103/PhysRevD.98.123512},
journal = {Physical Review D},
number = 12,
volume = 98,
place = {United States},
year = {Thu Dec 13 00:00:00 EST 2018},
month = {Thu Dec 13 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1103/PhysRevD.98.123512

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Cited by: 9 works
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