publication . Preprint . Article . 2016

Caustics for spherical waves

Hayato Motohashi; Claudia de Rham;
Open Access English
  • Published: 29 Nov 2016
  • Country: United Kingdom
Abstract
We study the development of caustics in shift-symmetric scalar field theories by focusing on simple waves with an $SO(p)$-symmetry in an arbitrary number of space dimensions. We show that the pure Galileon, the DBI-Galileon, and the extreme-relativistic Galileon naturally emerge as the unique set of caustic-free theories, highlighting a link between the caustic-free condition for simple $SO(p)$-waves and the existence of either a global Galilean symmetry or a global (extreme-)relativistic Galilean symmetry.
doi: 10.1103/physrevd.95.064008
Subjects
arXiv: Astrophysics::High Energy Astrophysical Phenomena
free text keywords: High Energy Physics - Theory, Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, FIELD-EQUATIONS, GRAVITY, SINGULARITY, SYSTEMS, TENSOR, SCALAR, SPACE, hep-th, astro-ph.CO, gr-qc, Born–Infeld model, Scalar field, Caustic (optics), Scalar (physics), Galilean, Classical mechanics, Spherical wave
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Funded by
NSF| The Physics Frontier Center of the Kavli Institute for Cosmological Physics
Project
The Physics Frontier Center of the Kavli Institute for Cosmological Physics
  • Funder: National Science Foundation (NSF)
  • Project Code: 0551142
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
, NSF| Center for Cosmological Physics
Project
Center for Cosmological Physics
  • Funder: National Science Foundation (NSF)
  • Project Code: 0114422
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
, EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN
, EC| InvisiblesPlus
Project
InvisiblesPlus
InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE
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