# Andrew Tolley

#### Associate Professor

#### Concentrations

Early Universe Cosmology, Dark Energy, Modified Gravity, Strings, Extra Dimensions, Branes

#### Interests

I am an Associate Professor in the Particle/Astrophysics Group at Case Western Reserve University. I am a theoretical cosmologist with interests in a wide range of topics, including: Developing models of the Early Universe, Inflation, Non-Gaussianities and Initial Conditions, Braneworlds and extra dimensions. More recently my research has focused on explanations of the late time acceleration of the Universe, through developing models of Dark Energy, and Modified Gravity, and addressing some of the challenges posed by the Cosmological Constant Problem.

Some highlights are:

- Development of Ghost-free theories of Massive Gravity, https://arxiv.org/abs/1011.1232
- A new model of inflation whose technical naturalness relies on a
Galileon

symmetry: Galileon Inflation, https://arxiv.org/abs/1009.2497 - A unification of DBI models and Galileon theories, https://arxiv.org/abs/1003.5917
- An extension of the DGP braneworld paradigm: Cascading Gravity, https://arxiv.org/abs/0711.2072
- A study of possible non-Gaussian signals from the inflationary initial state, https://arxiv.org/abs/0710.1302

I previously held the position of Distinguished Research Fellow in the Cosmology group of the Perimeter Institute for Theoretical Physics. Before that, I was a Postdoctoral Research Associate at the Physics Department of Princeton University. I received my PhD in Cosmology from the University of Cambridge, DAMTP, Gonville & Caius College in 2003. I graduated fromJesus College, Oxford University in 1999.

#### Talks

- Plenary Talk on Dark Energy, COSMO 2009
- Dynamics in the Dark, March 2009
- Cascading Perturbations, October 2008
- Constraining initial state non-gaussianity via backreaction, March 2008
- New Era for Cosmic Inflation, February 2008

#### Publications

“Galileon inflation”, C. Burrage, C. de Rham, D. Seery, Andrew J. Tolley, JCAP 01 (2011) 014 (2010), [arXiv:1009.2497 [hep-th]].

“DBI and the Galileon reunited”, C. de Rham, Andrew J. Tolley, JCAP 1005, 015 (2010), [arXiv:1003.5917 [hep-th]].

“The Gelaton Scenario: Equilateral non-Gaussianity from multi-field dynamics”, Andrew J. Tolley, M. Wyman, Phys. Rev. D81, 043502 (2010), [arXiv:0910.1853 [hep-th]].

“Bulk singularities and the effective cosmological constant for higher co-dimension branes”, Andrew J. Tolley, C. P. Burgess, D. Hoover et al., JHEP 0603, 091 (2006), [hep-th/0512218].

“Cascading Gravity and Degravitation”, C. de Rham, S. Hofmann, J. Khoury, Andrew J. Tolley JCAP 0802, 011 (2008), [arXiv:0712.2821 [hep-th]].

“Enhanced Non-Gaussianity from Excited Initial States”, R. Holman, Andrew J. Tolley, JCAP 0805, 001 (2008), [arXiv:0710.1302 [hep-th]].

“Cosmological perturbations in a big crunch/big bang space-time”, Andrew J. Tolley, N. Turok, P. J. Steinhardt, Phys. Rev. D69, 106005 (2004), [hep-th/0306109].

## Contact

andrew.j.tolley@case.edu

Rockefeller Building 208

## Education

Jesus College, Oxford University (1999)

Ph.D., University of Cambridge (2003)