K-dynamics: well-posed 1+1 evolutions in K-essence

K-dynamics: well-posed 1+1 evolutions in K-essence
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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
E. Barausse
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Miguel Bezares;M. Crisostomi;C. Palenzuela;E. Barausse

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我们研究 K 本质的真空柯西问题,即与宇宙学相关的标量张量理论,涉及一阶导数自相互作用,并且通过所有现有的引力波边界。我们仅限于球对称性,并表明存在一大类理论,即使存在标量激波/焦散,柯西问题在视黑洞视界之外也不会崩溃,除了一小组足够接近临界黑洞坍缩的初始数据。我们描述了这些有问题的初始数据,并表明它们导致特征曲线的速度较大甚至发散(坐标)。我们讨论了这个问题的物理相关性并提出了克服它的方法。
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.
DOI: 10.1103/physrevd.102.125023
发表时间: 2020
期刊: Physical Review D
影响因子: 5
作者:
Alberte L
通讯作者: Alberte L
DOI: 10.1103/physrevd.101.044015
发表时间: 2019-11
期刊: Physical Review D
影响因子: 5
作者:
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通讯作者: Justin L. Ripley;F. Pretorius
DOI: 10.1103/physrevlett.119.161101
发表时间: 2017-10-16
影响因子: 8.6
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