Dr. Tim Andreas Koslowski
|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:|
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.
||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.|
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
||my academic positions
|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).|