Tim Koslowski (ICN-UNAM)

contact information

Dr. Tim Andreas Koslowski (ICN)
Universidad Nacional Autónoma de México
Apartado Postal 70-543, Coyoacán 04510, Ciudad de México D.F., México
phone: (+52) 55 5622 4660 ext. 3343
email: koslowski at nucleares unam mx


Research: My research interests are in the foundations of quantum gravity. I have worked on several approaches to this problem including loop quantum gravity, asymptotic safety as well as matrix- and tensor models. However, most of my work in recent years has been focused on two approaches:
  1. the description of gravity in terms of shape dynamics
  2. the application of the functional renormalization group to quantum gravity
on shape dynamics: General relativity describes gravitational phenomena as curvature of spactime geometry. However GR possesses, despite its success in describing observed phenomena, two flaws: (1) it predicts its own break-down under generic initial conditions (so-called spacetime singularities) and (2) there is no known quantum theory that produces GR. These two problems are linked to two facts: (1) GR describes gravity as spacetime geometry and (2) GR fails to implement the relational principles that a theory of the entire universe should satisfy. Classical shape dynamics is a completely relational theory of gravity that describes gravitational phenomena as the evolution of spatial conformal geometry, while being almost completely indistinguishable from GR. It has been shown that shape dynamics evolves through spacetime singularities and it formulates new foundations for the search of quantum gravity. on the functional renormalization group: The functional renormalization group (or Wetterich's equation) is a very simple and successful implementation of the ideas of Kadanoff and Wilson that statistical and quantum field theories should be described as one parameter families of effective field theories, where the parameter is given by the physical resolution scale (or renormalization scale). Wetterich's equation is in particular a one-parameter interpolation between the bare action of a path integral and the quantum effective action. The quation has become an important and effective non-perturbative tool, which allows one to investigate quantum field theories in regimes where preturbative methods can not be applied. The FRGE has, besides many other applications in all aereas of non-perturbative physics, become a the most iportant tool in the investigation of the asymptotic safety conjecture in quantum gravity.
Shape Dynamics

Some of the ideas that underlie the shape dynamcis description of gravity have been extensively discussed in the media. A recent interview I gave lead to the following article. For the basic relational ideas that underlie shape dynamics see Julian Barbour's website and his introduction. A tutorial on shape dynamics was written by Flavio Mercati and wikipedia contains an entry about shape dynamics as well.
shape dynamics researchers conferences on shape dynamics
  1. Conformal Nature of the Universe, Perimeter Institute 2012
  2. International Shape Dynamics Workshop, UNB 2014
  3. Shape Dynamics@Convergence, Perimeter Institute 2015
  4. Shapes of Gravity (SD workshop), Radbound 2016
  5. International Shape Dynamics Workshop, UNAM 2016
Information about me
selected puclications

selected talks

my education
  • Master of Arts (physics), University of Texas at Austin, USA (2000)
  • Diplom Physiker Univ., Universität Würzburg, Germany (2003)
  • Dr. rer. nat., Universität Würzburg, Germany (2008)
my academic positions
  • Postdoctoral fellow, Perimeter Institute for Theoretical Physics, Canada (2008-2012)
  • Postdoctoral fellow, University of New Brunswick, Canada (2012-2015)
  • Investigador Titular A, UNAM, Mexico, (since 2015)
various I was the principle organizer of three conferences on shape dynamics ("Conformal nature of the universe", "International Shape Dynamics Workshop 2014" and "International Shape Dyamics Workshop 2016"). Together with F. Mercati I received a large grant from the Foundational Questions Institute (2013 large grant round) to investigate the arrow of time in shape dynamcis and together J. Barbour and F. Mercati I received the Buchalter Cosmology Prize (first prize 2016).

(c) Tim Andreas Koslowski, 2016