Asymptotic structure with a positive cosmological constant
نویسندگان
چکیده
This is the second of two papers that study asymptotic structure space-times with a non-negative cosmological constant $\Lambda$. paper deals case $\Lambda >0$. Our approach founded on `tidal energies' built Weyl curvature and, specifically, we use super-Poynting vector computed from rescaled Bel-Robinson tensor at infinity to provide covariant, gauge-invariant, criterion for existence, or absence, gravitational radiation infinity. The fundamental idea put forward physical properties are encoded in $(\scri,h_{ab},D_{ab})$, where first element triplet 3-dimensional manifold, representative conformal class Riemannian metrics $\scri$, and third traceless symmetric field $\scri$. We similarly propose no-incoming based also $(\scri,h_{ab},D_{ab})$ radiant supermomenta deduced too. search news tensors argue any news-like object must be associated to, depends on, 2-dimensional cross-sections identify one component every such cross-section present general strategy find component. introduce concept equipped consider limit $\Lambda\rightarrow 0$ apply all our results selected exact solutions Einstein Field Equations. full-length abstract available paper.
منابع مشابه
Quantum gravity with a positive cosmological constant
A quantum theory of gravity is described in the case of a positive cosmological constant in 3 + 1 dimensions. Both old and new results are described, which support the case that loop quantum gravity provides a satisfactory quantum theory of gravity. These include the existence of a ground state, discoverd by Kodama, which both is an exact solution to the constraints of quantum gravity and has a...
متن کاملAsymptotic Behaviour of the Einstein-vlasov System with a Positive Cosmological Constant
We study locally spatially homogeneous solutions of the EinsteinVlasov system with a positive cosmological constant. First the global existence of solutions of this system and the casual geodesic completeness are shown. Then the asymptotic behaviour of solutions in the future time is investigated in various aspects.
متن کاملAsymptotic directional structure of radiative fields in spacetimes with a cosmological constant
We analyze the directional properties of general gravitational, electromagnetic, and spin-s fields near conformal infinity I. The fields are evaluated in normalized tetrads which are parallelly propagated along null geodesics which approach a point P of I. The standard peelingoff property is recovered and its meaning is discussed and refined. When the (local) character of the conformal infinity...
متن کاملCosmic strings in a space-time with positive cosmological constant
We study Abelian strings in a fixed de Sitter background. We find that the gauge and Higgs fields extend smoothly across the cosmological horizon and that the string solutions have oscillating scalar fields outside the cosmological horizon for all currently accepted values of the cosmological constant. If the gauge to Higgs boson mass ratio is small enough, the gauge field function has a power-...
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: 2022
ISSN: ['1361-6382', '0264-9381']
DOI: https://doi.org/10.1088/1361-6382/ac395b