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Title: Gravitational waves from asymmetric oscillon dynamics?

Abstract

It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of e-folds of expansion after their formation, leading to potentially detectable gravitational wave signals. We revisit this claim by conducting a convergence study using graphics processing unit (GPU)-accelerated lattice simulations and show that numerical errors accumulated with time are significant in low-resolution scenarios, or in scenarios where the run-time causes the resolution to drop below the relevant scales in the problem. Our study determines that the dominant, growing high frequency peak of the gravitational wave signals in the fiducial "hill-top model" in [arXiv:1607.01314] is a numerical artifact. This new finding prompts the need for a more careful analysis of the numerical validity of other similar results related to gravitational waves from oscillon dynamics.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
+ Show Author Affiliations
  1. Rice Univ., Houston, TX (United States)
  2. Univ. College London (United Kingdom)
  3. Univ. of Nottingham (United Kingdom)
  4. Kenyon College, Gambier, OH (United States); Case Western Reserve Univ., Cleveland, OH (United States)
  5. Kenyon College, Gambier, OH (United States)
  6. Univ. of Illinois at Urbana-Champaign, IL (United States)
  7. Univ. of Science and Technology of China, Hefei (China)
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1594809
Alternate Identifier(s):
OSTI ID: 1461244
Grant/Contract Number:  
[SC0018216; NNX17AG48G; PHY-1607761; KY2030000089; G02-97ER25308; PHY-1719652; ST-P000703-1; ST-L000393-1; FP7-2007-2013; FG02-97ER25308]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
[ Journal Volume: 98; Journal Issue: 2]; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Evolution of the Universe; Gravitational waves; Inflation

Citation Formats

Amin, Mustafa A., Braden, Jonathan, Copeland, Edmund J., Giblin, John T., Solorio, Christian, Weiner, Zachary J., and Zhou, Shuang-Yong. Gravitational waves from asymmetric oscillon dynamics?. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.024040.
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Amin, Mustafa A., Braden, Jonathan, Copeland, Edmund J., Giblin, John T., Solorio, Christian, Weiner, Zachary J., & Zhou, Shuang-Yong. Gravitational waves from asymmetric oscillon dynamics?. United States. doi:10.1103/PhysRevD.98.024040.
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Amin, Mustafa A., Braden, Jonathan, Copeland, Edmund J., Giblin, John T., Solorio, Christian, Weiner, Zachary J., and Zhou, Shuang-Yong. Mon . "Gravitational waves from asymmetric oscillon dynamics?". United States. doi:10.1103/PhysRevD.98.024040. https://www.osti.gov/servlets/purl/1594809.
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@article{osti_1594809,
title = {Gravitational waves from asymmetric oscillon dynamics?},
author = {Amin, Mustafa A. and Braden, Jonathan and Copeland, Edmund J. and Giblin, John T. and Solorio, Christian and Weiner, Zachary J. and Zhou, Shuang-Yong},
abstractNote = {It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of e-folds of expansion after their formation, leading to potentially detectable gravitational wave signals. We revisit this claim by conducting a convergence study using graphics processing unit (GPU)-accelerated lattice simulations and show that numerical errors accumulated with time are significant in low-resolution scenarios, or in scenarios where the run-time causes the resolution to drop below the relevant scales in the problem. Our study determines that the dominant, growing high frequency peak of the gravitational wave signals in the fiducial "hill-top model" in [arXiv:1607.01314] is a numerical artifact. This new finding prompts the need for a more careful analysis of the numerical validity of other similar results related to gravitational waves from oscillon dynamics.},
doi = {10.1103/PhysRevD.98.024040},
journal = {Physical Review D},
number = [2],
volume = [98],
place = {United States},
year = {2018},
month = {7}
}
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DOI:  10.1103/PhysRevD.98.024040
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