Research:
My research focuses on the intersection between string theory, cosmology, and particle physics. I am interested in the physics of black holes and gravitational thermodynamics, early universe cosmology and its implications for fundamental physics, and in formal aspects of string theory and quantum gravity.

Selected Publications:Click here for an uptodate list of my publications.
"When worlds collide."
Spencer Chang, Matthew Kleban, Thomas S. Levi . Dec 2007.
ePrint Archive:
hepth/0712.2261
"Expanding FTheory."
Matthew Kleban, Michele Redi. May 2007.
ePrint Archive:
hepth/0705.2020
"Cosmic 21cm fluctuations as a probe of fundamental physics."
Matthew Kleban, Kris Sigurdson, Ian Swanson. March 2007.
ePrint Archive:
hepth/0703215
"Transitions Between de Sitter Minima."
Puneet Batra, Matthew Kleban . Dec 2006.
ePrint Archive:
hepth/0612083.
"Causality Constrains Higher Curvature Corrections to Gravity."
A. Gruzinov, M. Kleban . Dec 2006.
ePrint Archive:
hepth/0612015.
"Gravitational Backreaction of Matter Inhomogeneities."
A. Gruzinov, M. Kleban , M. Porrati, Michele Redi.
ePrint Archive:
astroph/0609553.
"Observational consequences of a landscape," with
Ben Freivogel, Maria Rodriguez Martinez, and Leonard Susskind.
JHEP 0603:039,2006,
hepth/0505232.
"Poincare recurrences and topological diversity," with
Massimo Porrati and Raul Rabadan.
JHEP 0410:030,2004,
hepth/0407192.
"Observational implications of cosmological event horizons," with
Nemanja Kaloper and Lorenzo Sorbo.
Phys.Lett.B600:714,2004,
astroph/0406099.
"(1+1)dimensional compactifications of string theory," with
Naureen Goheer and Leonard Susskind.
Phys.Rev.Lett.92:191601,2004,
hepth/0310120.
"The Black hole singularity in AdS / CFT," with
Lukasz Fidkowski, Veronika Hubeny, and Stephen Shenker.
JHEP 0402:014,2004,
hepth/0306170.
"Disturbing implications of a cosmological constant," with
Lisa Dyson and Leonard Susskind.
JHEP 0210:011,2002,
hepth/0208013.
"Signatures of short distance physics in the cosmic microwave background," with Nemanja Kaloper, Albion E. Lawrence, and Stephen Shenker.
Phys.Rev.D66:123510,2002,
hepth/0201158. 