386 citations · 5.6k across the 175 of their papers we have counts for
6 papers · 1 filter
2D Quantum Gravity Coupled to Renormalizable Matter Fields
Jan Ambjorn, Kazuo Ghoroku
We consider two-dimensional quantum gravity coupled to matter fields which are renormalizable, but not conformal invariant. Questions concerning the $\b$ function and the effective…
From 1-matrix model to Kontsevich model
Jan Ambjorn, Charlotte F. Kristjansen
Loop equations of matrix models express the invariance of the models under field redefinitions. We use loop equations to prove that it is possible to define continuum times for the…
Electroweak Magnetism, W-condensation and Anti-Screening
Jan Ambjorn, Poul Olesen
We review how external magnetic fields act as perfect probes of the non-abelian nature of the electroweak theory.
4D Quantum Gravity Coupled to Matter
J. Ambjorn, Z. Burda, J. Jurkiewicz +1
We investigate the phase structure of four-dimensional quantum gravity coupled to Ising spins or Gaussian scalar fields by means of numerical simulations. The quantum gravity part…
Observing 4D Baby Universes in Quantum Gravity
J. Ambjorn, S. Jain, J. Jurkiewicz +1
We measure the fractal structure of four dimensional simplicial quantum gravity by identifying so-called baby universes. This allows an easy determination of the critical exponent…
Matrix Model Calculations beyond the Spherical Limit
J. Ambjørn, L. Chekhov, C. F. Kristjansen +1
We propose an improved iterative scheme for calculating higher genus contributions to the multi-loop (or multi-point) correlators and the partition function of the hermitian one ma…