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19912026
Showing 2009 · gr-qcShow all

18 papers · 2 filters

gr-qc2009★ 71 cited

From covariant to canonical formulations of discrete gravity

Bianca Dittrich, Philipp A Hoehn

Starting from an action for discretized gravity we derive a canonical formalism that exactly reproduces the dynamics and (broken) symmetries of the covariant formalism. For lineari…

gr-qc2009

The Newtonian Limit of Hermitian Gravity

Jeroen G. Burgers, Christiaan L. M. Mantz, Tomislav Prokopec

We construct the gauge invariant potentials of Hermitian Gravity and derive the linearized equations of motion they obey. A comparison reveals a striking similarity to the Bardeen…

gr-qc2009★ 4 cited

Dynamics driven by the Trace Anomaly in FLRW Universes

J. F. Koksma

By means of a semiclassical analysis we show that the trace anomaly does not affect the cosmological constant. We calculate the evolution of the Hubble parameter in quasi de Sitter…

gr-qc2009★ 74 cited

Cosmology of modified (but second order) gravity

Tomi S. Koivisto

This is a brief review of modified gravity cosmologies. Generically extensions of gravity action involve higher derivative terms, which can result in ghosts and instabilities. Ther…

gr-qc2009★ 9 cited

Quantum Cosmological Metroland Model

Edward Anderson, Anne Franzen

Relational particle mechanics is useful for modelling whole-universe issues such as quantum cosmology or the problem of time in quantum gravity, including some aspects outside the…

gr-qc2009★ 22 cited

Sub-leading asymptotic behaviour of area correlations in the Barrett-Crane model

J. Daniel Christensen, Igor Khavkine, Etera R. Livine +1

The Barrett-Crane spin foam model for quantum gravity provides an excellent setting for testing analytical and numerical tools used to probe spinfoam models. Here, we complete the…