386 citations · 5.6k across the 175 of their papers we have counts for
6 papers · 1 filter
Stripes from (noncommutative) stars
J. Ambjorn, S. Catterall
We show that lattice regularization of noncommutative field theories can be used to study non-perturbative vacuum phases. Specifically we provide evidence for the existence of a st…
Interpolating between open and closed strings - a BSFT approach
J. Ambjorn, R. A. Janik
We address the conjecture that at the tachyonic vacuum open strings get transformed into closed strings. We show that it is possible in the context of boundary string field theory…
A Lorentzian cure for Euclidean troubles
J. Ambjorn, A. Dasgupta, J. Jurkiewicz +1
There is strong evidence coming from Lorentzian dynamical triangulations that the unboundedness of the gravitational action is no obstacle to the construction of a well-defined non…
3d Lorentzian, Dynamically Triangulated Quantum Gravity
J. Ambjorn, J. Jurkiewicz, R. Loll
The model of Lorentzian three-dimensional dynamical triangulations provides a non-perturbative definition of three-dimensional quantum gravity. The theory has two phases: a weak-co…
Strings, quantum gravity and non-commutative geometry on the lattice
J. Ambjorn
I review recent progress in understanding non-perturbative aspects of string theory, quantum gravity and non-commutative geometry using lattice methods.
Simplicial Euclidean and Lorentzian Quantum Gravity
J. Ambjorn
One can try to define the theory of quantum gravity as the sum over geometries. In two dimensions the sum over {\it Euclidean} geometries can be performed constructively by the met…