Andrew J. Tolley, Ph.D.

I am currently a Distinguished Research Fellow in the Cosmology group of the Perimeter Institute for Theoretical Physics in Waterloo, Canada. 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 from Jesus College, Oxford University in 1999.

    Main interests

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



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. I am particularly interested in exploring the implications of String Theory, Branes and Extra Dimensions for Cosmology, as well as Models of Dark Energy, in particular those arising from Infrared Modifications of Gravity, and the associated Cosmological Constant Problem.


    In near future:


∗ New Horizons In Fundamental Physics,

A brief history of our cosmic beginnings, Cosmic Microwave Background. How galaxies form and the existence of dark matter.
March - April 2008

Cosmology #1, Cosmology #2, Cosmology #3, Cosmology #4.

∗ Nordita Summer School on de Sitter Cosmology,

The Cosmological Constant Challenge,
August 2008

CMB/LSS summer school, Pune India,

August 2008