159 citations · 1.6k across the 48 of their papers we have counts for
7 papers · 1 filter
Spherical Domain Wall Collapse in a Dust Universe
Norihiro Tanahashi, Chul-Moon Yoo
To clarify observational consequence of bubble nucleations in inflationary era, we analyse dynamics of a spherical domain wall in an expanding universe. We consider a spherical she…
Shock Formation in Lovelock Theories
Harvey S. Reall, Norihiro Tanahashi, Benson Way
We argue that Lovelock theories of gravity suffer from shock formation, unlike General Relativity. We consider the propagation of (i) a discontinuity in curvature, and (ii) weak, h…
Causality and Hyperbolicity of Lovelock Theories
Harvey S. Reall, Norihiro Tanahashi, Benson Way
In Lovelock theories, gravity can travel faster or slower than light. The causal structure is determined by the characteristic hypersurfaces. We generalise a recent result of Izumi…
Viable cosmology in bimetric theory
Antonio De Felice, A. Emir Gumrukcuoglu, Shinji Mukohyama +2
We study cosmological perturbations in bimetric theory with two fluids each of which is coupled to one of the two metrics. Focusing on a healthy branch of background solutions, we…
Exact black hole solutions in shift symmetric scalar-tensor theories
Tsutomu Kobayashi, Norihiro Tanahashi
We derive a variety of exact black hole solutions in a subclass of Horndeski's scalar-tensor theory possessing shift symmetry, , and reflection symmetry, . The the…
Dynamical Meson Melting in Holography
Takaaki Ishii, Shunichiro Kinoshita, Keiju Murata +1
We discuss mesons in thermalizing gluon backgrounds in the N=2 supersymmetric QCD using the gravity dual. We numerically compute the dynamics of a probe D7-brane in the Vaidya-AdS…