133 citations · 1.4k across the 35 of their papers we have counts for
4 papers · 1 filter
First-order adiabatic perturbations of a perfect fluid about a general FLRW background using the 1+3 covariant and gauge-invariant formalism
Sylvain D. Brechet, Michael P. Hobson, Anthony N. Lasenby
An analysis of adiabatic perturbations of a perfect fluid is performed to first-order about a general FLRW background using the 1+3 covariant and gauge-invariant formalism. The ana…
Bootstrapping gravity: a consistent approach to energy-momentum self-coupling
Luke M. Butcher, Michael Hobson, Anthony Lasenby
It is generally believed that coupling the graviton (a classical Fierz-Pauli massless spin-2 field) to its own energy-momentum tensor successfully recreates the dynamics of the Ein…
An anisotropic, non-singular early universe model leading to a realistic cosmology
Pierre-Philippe Dechant, Anthony N. Lasenby, Michael P. Hobson
We present a novel cosmological model in which scalar field matter in a biaxial Bianchi IX geometry leads to a non-singular `pancaking' solution: the hypersurface volume goes to ze…
The physical significance of the Babak-Grishchuk gravitational energy-momentum tensor
Luke M. Butcher, Anthony Lasenby, Michael Hobson
We examine the claim of Babak and Grishchuk [1] to have solved the problem of localising the energy and momentum of the gravitational field. After summarising Grishchuk's flat-spac…