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Author:
Astrid Eichhorn, Razvan Gurau, Zois Gyftopoulos
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Author:
Tomohiro Matsuda
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Nobody volunteered yet
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Total votes:
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(last vote was 5 months ago)
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Votes: 2
8 years ago Author:
Ashley Perko, Leonardo Senatore, Elise Jennings, Risa H. Wechsler
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8 years ago Author:
Tommi Markkanen
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Alexander Monin, David Pirtskhalava, Riccardo Rattazzi, Fiona K. Seibold
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Gregory Gabadadze, Siqing Yu
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Nicola Bellomo, Emilio Bellini, Bin Hu, Raul Jimenez, Carlos Pena-Garay, Licia Verde
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8 years ago Author:
Pablo Arnalte-Mur, Wojciech A. Hellwing, Peder Norberg
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Philippe Brax, Patrick Valageas
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8 years ago Author:
Pedro G. Ferreira, Christopher T. Hill, Graham G. Ross
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8 years ago Author:
Mark P. Hertzberg
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8 years ago
Title: Norihiro Tanahashi "Causal structure and shock formation in the most general scalar-tensor theories"
Description: Wave propagation speed in scalar-tensor theories may vary depending on
environment, and it can cause many peculiar phenomena such as
superluminal propagation and wave form distortion. In this work, we
focus on Horndeski theory and its generalization to two scalar fields,
and examine causal structure and shock formation in those theories.
About the causal structure, we focus on a stationary black hole, and
check if scalar or gravitational wave could come out from black hole
interior to exterior by propagating superluminally. We find that the
scalar field must satisfy certain conditions to prohibit such a
propagation across the horizon. About the shock formation, we examine
conditions for that to occur in Horndeski theory. When the background
solution is symmetric enough, we find that the gravitational wave is
protected from the shock formation while the scalar field suffers from
it.
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