期刊
PHYSICAL REVIEW D
卷 98, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.024040
关键词
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资金
- United States Department of Energy [DE-SC0018216]
- European Research Council under the European Community's Seventh Framework Program (FP7/2007-2013) / ERC [306478-CosmicDawn]
- STFC consolidated Grants [ST/L000393/1, ST/P000703/1]
- National Science Foundation [PHY-1719652, PHY-1607761]
- United States Department of Energy Computational Science Graduate Fellowship [DE-FG02-97ER25308]
- University of Science and Technology of China [KY2030000089]
- National 1000 Young Talents Program of China
- National Science Foundation
- NASA under NASA Astrophysics Theory Grant [NNX17AG48G]
- STFC [ST/P000703/1, ST/L000393/1] Funding Source: UKRI
- NASA [NNX17AG48G, 1001333] Funding Source: Federal RePORTER
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 by Antusch et al., [Phys. Rev. Lett. 118, 011303 (2017).] is a numerical artifact. This finding prompts the need for a more careful analysis of the numerical validity of other similar results related to gravitational waves from oscillon dynamics.
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