Dr Benjamin Bahr
Career
- 2008-date: Research Fellow of Peterhouse
- 2005-2008: PhD at Max-Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam
Research
Benjamin is a member of the Department of Applied Mathematics and Theoretical Physics Gravitation and Relativity research group. His current research interests are canonical quantum gravity, state sum models, the spin foam formulation of loop quantum gravity, and discrete gravity such as Regge calculus. Research is focused on the role of diffeomorphism symmetry in discrete and quantum gravity, as well as the construction of perfect classical actions for discretised GR. Furthermore, he investigates applications of ideas from renormalization to spin foam models, in order to undeerstand better the properties of these models under coarse-graining.
Selected Publications
- Bahr, Dittrich: "(Broken) Gauge Symmetries and Constraints in Regge Calculus", Class.Quant.Grav. 26:225011, 2009
- Bahr, Dittrich: "Improved and perfect actions for discrete Gravity", Phys.Rev.D80:124030, 2009
- Bahr, Dittrich: "Regge Calculus from a New angle", N.J.Phys. 12:033010, 2010
- Bahr: "On knottings in the physical Hilbert space of LQG as given by the EPRL model" Class.Quant.Grav.28:045002,2011 [arXiv:1006.0700]
- Bahr, Hellmann, Kaminski, Kisielowski, Lewandowski: "Operator Spin Foam models" Class.Quant.Grav.28:105003,2011 [arXiv:1010.4787]
- Bahr, Dittrich, Steinhaus: "Perfect discretization of reparametrization-invariant path integrals" [arXiv:1101.4775]