Dynamics of a spherically symmetric inhomogeneous coupled dark energy model with coupling term proportional to non relatvistic matter
Sign Up to like & getrecommendations! Published in 2017 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-017-2321-9
Abstract: The quasi-local scalar variables approach is applied to a spherically symmetric inhomogeneous Lemaître–Tolman–Bondi metric containing a mixture of non-relativistic cold dark matter and coupled dark energy with constant equation of state. The quasi-local coupling term… read more here.
Keywords: energy; matter; quasi local; dark energy ... See more keywords
Quasi-local energy from a Minkowski reference
Sign Up to like & getrecommendations! Published in 2018 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-018-2484-z
Abstract: The specification of energy for gravitating systems has been an unsettled issue since Einstein proposed his pseudotensor. It is now understood that energy-momentum is quasi-local (associated with a closed 2-surface). Here we consider quasi-local proposals… read more here.
Keywords: minkowski reference; energy; local energy; energy minkowski ... See more keywords
Quasi-local instantaneous charges asymptotics at spatial infinity
Sign Up to like & getrecommendations! Published in 2022 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-022-02912-9
Abstract: The article aims to analyze a construction of charges (conserved quantities) for the gravity field in the (3+1) decomposition. The construction is based on (3+1) splitting of conformal Yano–Killing (CYK) two-form. The splitting leads to… read more here.
Keywords: asymptotics spatial; quasi local; instantaneous charges; charges asymptotics ... See more keywords
A quasi-local characterisation of L-Roe algebras
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Mathematical Analysis and Applications"
DOI: 10.1016/j.jmaa.2019.02.013
Abstract: Abstract Very recently, Spakula and Tikuisis provide a new characterisation of (uniform) Roe algebras via quasi-locality when the underlying metric spaces have straight finite decomposition complexity. In this paper, we improve their method to deal… read more here.
Keywords: roe; local characterisation; roe algebras; quasi local ... See more keywords
The initial boundary value problem and quasi-local Hamiltonians in general relativity
Sign Up to like & getrecommendations! Published in 2021 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac0a86
Abstract: We discuss relations between the initial boundary value problem (IBVP) and quasi-local Hamiltonians in GR. The latter have traditionally been based on Dirichlet boundary conditions, which however are shown here to be ill-posed for the… read more here.
Keywords: initial boundary; value problem; quasi local; boundary value ... See more keywords