K-dynamics: well-posed 1+1 evolutions in K-essence
K-dynamics: well-posed 1+1 evolutions in K-essence
复制标题
K-动力学:K-本质中适定的 1 1 演化
DOI:
10.1088/1475-7516/2021/03/072
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发表时间:
2020
影响因子:
6.4
通讯作者:
E. Barausse
中科院分区:
文献类型:
--
作者:
Miguel Bezares;M. Crisostomi;C. Palenzuela;E. Barausse
We study the vacuum Cauchy problem for K-essence, i.e. cosmologically relevant scalar-tensor theories that involve first-order derivative self-interactions, and which pass all existing gravitational wave bounds. We restrict to spherical symmetry and show that there exists a large class of theories for which no breakdown of the Cauchy problem occurs outside apparent black hole horizons, even in the presence of scalar shocks/caustics, except for a small set of initial data sufficiently close to critical black hole collapse. We characterise these problematic initial data, and show that they lead to large or even diverging (coordinate) speeds for the characteristic curves. We discuss the physical relevance of this problem and propose ways to overcome it.
影响因子:
5
作者:
Alberte L
通讯作者:
Alberte L
影响因子:
5
作者:
Justin L. Ripley;F. Pretorius
通讯作者:
Justin L. Ripley;F. Pretorius
影响因子:
8.6
作者:
Abbott, B. P.;Abbott, R.;Zweizig, J.
通讯作者:
Zweizig, J.