Dr Timothy Clifton
Senior Lecturer in Theoretical Cosmology
Email: t.clifton@qmul.ac.ukTelephone: 020 7882 7024Room Number: G. O. Jones Building, Room 508
Research
Research Interests:
My research interests are in relativity, gravitation, and cosmology. I am particularly interested in the large-scale behaviour of inhomogeneous spacetimes, the emergence of homogeneity and isotropy in the context of the averaging and backreaction problems, the construction of tests for determining the geometry of the Universe, and the understanding and constraining of alternative theories of gravity. As well as being of foundational importance to cosmology, the study of these areas is strongly motivated by the apparent need for the universe to be more than two thirds filled with dark energy.
Publications
Recent publication and preprints can be found here.
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Clifton T, Sanghai VAA (2019). Parametrizing theories of gravity on large and small scales in cosmology. nameOfConference
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Gallagher CS, Clifton T (2018). Relativistic Euler equations in cosmologies with nonlinear structures. nameOfConference
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CLIFTON TA, Bentivegna E, DURK J et al. (2018). Black-Hole Lattices as Cosmological Models. nameOfConference
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Goldberg SR, Gallagher C, Clifton T (2017). Perturbation theory for cosmologies with non-linear structure. nameOfConference
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Durk J, Clifton T (2017). A quasi-static approach to structure formation in black hole universes. nameOfConference
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Sanghai VAA, Fleury P, Clifton T (2017). Ray tracing and Hubble diagrams in post-Newtonian cosmology. nameOfConference
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Clifton T, Carr B, Coley A (2017). Persistent black holes in bouncing cosmologies. nameOfConference
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Bibi R, Clifton T, Durk J (2017). Cosmological solutions with charged black holes. nameOfConference
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CLIFTON TA, Durk J (2017). Exact initial data for black hole universes with a cosmological constant. nameOfConference
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CLIFTON TA, Sanghai V (2017). Parameterized post-Newtonian cosmology. nameOfConference
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Clifton T, Gregoris D, Rosquist K (2017). The Magnetic Part of the Weyl Tensor, and the Expansion of Discrete Universes. nameOfConference
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Sanghai VAA, Clifton T (2016). Cosmological backreaction in the presence of radiation and a cosmological constant. nameOfConference
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Sanghai VAA, Clifton T (2016). Erratum: Post-Newtonian cosmological modelling (Physical Review D - Particles, Fields, Gravitation and Cosmology (2015) 91 (103532)). nameOfConference
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Sanghai VAA, Clifton T (2015). Post-Newtonian cosmological modelling. nameOfConference
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Clifton T (2014). The method of images in cosmology. nameOfConference
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Clifton T, Gregoris D, Rosquist K (2014). Piecewise silence in discrete cosmological models. nameOfConference
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Clifton T, Gregoris D, Rosquist K et al. (2013). Exact Evolution of Discrete Relativistic Cosmological Models. nameOfConference
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Clifton T, Ellis GFR, Tavakol R (2013). A Gravitational Entropy Proposal. nameOfConference
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CLIFTON TA (2013). BACK-REACTION IN RELATIVISTIC COSMOLOGY. nameOfConference
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CLIFTON TA (2013). G. F. R. Ellis, R. Maartens and M. A. H. MacCallum: Relativistic cosmology. nameOfConference
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Clifton T, Dunsby P, Goswami R et al. (2012). On the absence of the usual weak-field limit, and the impossibility of embedding some known solutions for isolated masses in cosmologies with f(R) dark energy. nameOfConference
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Clifton T, Coley A, Hoogen RVD (2012). Observational cosmology in macroscopic gravity. nameOfConference
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Clifton T, Rosquist K, Tavakol R (2012). An exact quantification of backreaction in relativistic cosmology. nameOfConference
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Clifton T, Clarkson C, Bull P (2012). Isotropic Blackbody Cosmic Microwave Background Radiation as Evidence for a Homogeneous Universe. nameOfConference
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Clifton T, Clarkson C, Bull P (2012). The isotropic blackbody CMB as evidence for a homogeneous universe. nameOfConference
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CLIFTON TA, Bull P (2012). Local and non-local measures of acceleration in cosmology. nameOfConference
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Bull P, Clifton T (2012). Local and nonlocal measures of acceleration in cosmology. nameOfConference
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Clifton T, Ferreira PG, Padilla A et al. (2012). Modified gravity and cosmology. nameOfConference
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Clifton T, Ferreira PG, O¿Donnell K (2012). Improved treatment of optics in the Lindquist-Wheeler models. nameOfConference
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CLIFTON TA, BULL, P, FERREIRA PG (2012). The kSZ effect as a test of general radial inhomogeneity in LTB cosmology. nameOfConference
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Clifton T (2011). Cosmology without averaging. nameOfConference
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Clifton T, Bañados M, Skordis C (2010). The parameterized post-Newtonian limit of bimetric theories of gravity. nameOfConference
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Clifton T, Zlosnik TG (2010). FRW cosmology in Milgrom’s bimetric theory of gravity. nameOfConference
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Clifton T, Barrow JD (2010). Observational constraints on the completeness of space near astrophysical objects. nameOfConference
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Clifton T, Zuntz J (2009). Hubble diagram dispersion from large-scale structure. nameOfConference
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Clifton T, Ferreira PG (2009). Errors in estimating Ω Λ due to the fluid approximation. nameOfConference
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Clifton T, Ferreira PG (2009). Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content. nameOfConference
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Clifton T, Ferreira PG, Zuntz J (2009). What the small angle CMB really tells us about the curvature of the Universe. nameOfConference
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Clarkson C, Clifton T, February S (2009). Perturbation theory in Lemaȋtre-Tolman-Bondi cosmology. nameOfConference
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Clifton T (2008). Higher powers in gravitation. nameOfConference
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Clifton T (2008). Properties of black hole radiation from tunnelling. nameOfConference
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Clifton T, Ferreira PG, Land K (2008). Living in a Void: Testing the Copernican Principle with Distant Supernovae. nameOfConference
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Clifton T, Weisberg JM (2008). A Simple Model for Pulse Profiles from Precessing Pulsars, with Special Application to Relativistic Binary PSR B1913+16. nameOfConference
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Clifton T (2008). Parametrized post-Newtonian limit of fourth-order theories of gravity. nameOfConference
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Clifton T (2007). Exact Friedmann solutions in higher-order gravity theories. nameOfConference
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Clifton T, Shenker S, Sivanandam N (2007). Volume weighted measures of eternal inflation in the Bousso-Polchinski landscape. nameOfConference
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Clifton T, Linde A, Sivanandam N (2007). Islands in the landscape. nameOfConference
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Clifton T, Barrow JD (2007). Ups and downs of cyclic universes. nameOfConference
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Clifton T (2006). Spherically symmetric solutions to fourth-order theories of gravity. nameOfConference
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Clifton T, Barrow JD (2006). Further exact cosmological solutions to higher-order gravity theories. nameOfConference
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Barrow JD, Clifton T (2006). Cosmologies with energy exchange. nameOfConference
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Clifton T, Barrow JD (2006). Decaying gravity. nameOfConference
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Barrow JD, Clifton T (2006). Exact cosmological solutions of scale-invariant gravity theories. nameOfConference
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Clifton T, Barrow JD (2005). The existence of Gödel, Einstein, and de Sitter universes. nameOfConference
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Clifton T, Barrow JD (2005). The power of general relativity. nameOfConference
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Clifton T, Barrow JD, Scherrer RJ (2005). Constraints on the variation of from primordial nucleosynthesis. nameOfConference
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Clifton T, Mota DF, Barrow JD (2005). Inhomogeneous gravity. nameOfConference
PhD Supervision
This is not an exhaustive list and I would be happy to discuss other project possibilities.