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2019

The cosmology of minimal varying Lambda theories

Alexander, Stephon, Cortês, Marina, Liddle, Andrew R. et al.

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Inserting a varying Lambda in Einstein's field equations can be made consistent with the Bianchi identities by allowing for torsion, without the need to add scalar field degrees of freedom.

In the minimal such theory, Lambda is totally free and undetermined by the field equations in the absence of matter.
Inclusion of matter ties Lambda algebraically to it, at least when homogeneity and isotropy are assumed, i.e.
when there is no Weyl curvature.

The cosmology of minimal varying Lambda theories · Around

Built on

S. Alexander, M. Cortês, A. R. Liddle, J. Magueijo, R. Sims, and L. Smolin, A Zero-Parameter Extension of General Relativity with Varying Cosmological Constant
Original
1905
Earlier work this paper cites.
J. Magueijo and T. G. Zlośnik, Parity violating Friedmann Universes
Original
1908
Earlier work this paper cites.
T. W. B. Kibble, Lorentz invariance and the gravitational field
1961
Earlier work this paper cites.
S. Tsujikawa, Quintessence: A Review
Original
1961
Earlier work this paper cites.
J. F. Plebański, On the separation of Einsteinian substructures
1977
Earlier work this paper cites.

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