140 citations · 1.2k across the 29 of their papers we have counts for
30 papers
Properties of the Hamiltonian Renormalisation and its application to quantum mechanics on the circle
Benjamin Bahr, Klaus Liegener
We consider the Hamiltonian renormalisation group flow of discretised one-dimensional physical theories. In particular, we investigate the influence the choice of different embeddi…
Hopf link volume simplicity constraints in spin foam models
Mehdi Assanioussi, Benjamin Bahr
In this article we consider specific bivector geometries which arise in the large-spin limit of the extension of the Engle-Pereira-Rovelli-Livine spin foam model for quantum gravit…
Entanglement entropy of physical states in hypercuboidally truncated spin foam quantum gravity
Benjamin Bahr
In this article we consider physical states in the hypercuboidal truncation of the EPRL-FK spin foam quantum gravity model. In particular, these states are defined on graphs which…
Non-convex 4d polytopes in Spin Foam Models
Benjamin Bahr
In this article we consider non-convex polytopes in . The paper consist of two parts: Firstly, we extend the proof of the formula for the volume in terms of…
Volume of 4-polytopes from bivectors
Benjamin Bahr
In this article we prove a formula for the volume of 4-dimensional polytopes, in terms of their face bivectors, and the crossings within their boundary graph. This proves that the…
Renormalization of symmetry restricted spin foam models with curvature in the asymptotic regime
Benjamin Bahr, Giovanni Rabuffo, Sebastian Steinhaus
We study the renormalization group flow of the Euclidean Engle-Pereira-Rovelli-Livine and Freidel-Krasnov (EPRL-FK) spin foam model in the large--limit. The vertex amplitude is…