194 citations · 480 across the 16 of their papers we have counts for
11 papers · 1 filter
Impact of topology in causal dynamical triangulations quantum gravity
Jan Ambjorn, Zbigniew Drogosz, Jakub Gizbert-Studnicki +3
We investigate the impact of spatial topology in 3+1 dimensional causal dynamical triangulations (CDT) by performing numerical simulations with toroidal spatial topology instead of…
Renormalization Group Flow in CDT
J. Ambjorn, A. Goerlich, J. Jurkiewicz +2
We perform a first investigation of the coupling constant flow of the nonperturbative lattice model of four-dimensional quantum gravity given in terms of Causal Dynamical Triangula…
Two-Dimensional Quantum Geometry
J. Ambjorn, T. Budd
In these lectures we review our present understanding of the fractal structure of two-dimensional Euclidean quantum gravity coupled to matter.
A non-perturbative Lorentzian path integral for gravity
J. Ambjorn, J. Jurkiewicz, R. Loll
A well-defined regularized path integral for Lorentzian quantum gravity in three and four dimensions is constructed, given in terms of a sum over dynamically triangulated causal sp…
Screening and D-brane Dynamics in Finite Temperature Superstring Theory
J. Ambjorn, Yu. Makeenko, G. W. Semenoff +1
The thermal dynamics of D-branes and of open superstrings in background gauge fields is studied. It is shown that D-brane dynamics forbids constant velocity motion at finite temper…
Non-critical open strings beyond the semi-classical approximation
J. Ambjorn, K. Hayasaka, R. Nakayama
We studied the lowest order quantum corrections to the macroscopic wave functions of non-critical string theory using the semi-classical expansion of Liouville theory.…