A numerical relativity scheme for cosmological simulations
نویسندگان
چکیده
منابع مشابه
Numerical methods in cosmological global texture simulations.
Numerical simulations of the evolution of a global topological defect field have two characteristic length scales — one macrophysical, of order the field correlation length, and the other microphysical, of order the field width. The situation currently of most interest to particle cosmologists involves the behaviour of a GUT-scale defect field at the epoch of decoupling, where the ratio of thes...
متن کاملTowards a singularity-proof scheme in numerical relativity.
Progress in numerical relativity has been hindered for 30 years because of the difficulties of avoiding spacetime singularities in numerical evolution. We propose a scheme which excises a region inside an apparent horizon containing the singularity. Two major ingredients of the scheme are the use of a horizon-locking coordinate and a finite differencing which respects the causal structure of th...
متن کاملA Cosmological Test for General Relativity
The latest results in cosmography as well as the latest observations of the cosmic microwave background (CMB) and of supernovae have reinforced the emergence of a canonical paradigm for cosmology. Most of the cosmological parameters constituting this concordance model are now known up to five per cent of relative accuracy. We can rely on these accurate values of the parameters if the fundamenta...
متن کاملA numerical scheme for space-time fractional advection-dispersion equation
In this paper, we develop a numerical resolution of the space-time fractional advection-dispersion equation. We utilize spectral-collocation method combining with a product integration technique in order to discretize the terms involving spatial fractional order derivatives that leads to a simple evaluation of the related terms. By using Bernstein polynomial basis, the problem is transformed in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2017
ISSN: 0264-9381,1361-6382
DOI: 10.1088/1361-6382/aa9312