7 papers
A matrix free action of the Ashtekar-Lewandowski volume operator of loop quantum gravity
Waleed Sherif
The Ashtekar-Lewandowski (AL) volume operator of loop quantum gravity is central to the Hamiltonian constraint, but its vertex action is usually obtained from dense spectral decomp…
Fuzzy-novae
Francesco Fazzini, Waleed Sherif
We propose a novel phenomenological model of quantum gravitational collapse inspired by loop quantum gravity that ensures a completely regular spacetime evolution. By incorporating…
Emergent Thiemann coherent states in the near-kernel sector of quantum reduced loop gravity
Ilkka Mäkinen, Hanno Sahlmann, Waleed Sherif
We study the near-kernel sector of the Hamiltonian constraint operator in the one-vertex model of quantum reduced loop gravity using variational Monte Carlo methods with neural qua…
Finding and characterising physical states of Euclidean Abelianized loop quantum gravity using neural quantum states
Hanno Sahlmann, Waleed Sherif
We study physical (near-kernel of constraints) states of 4-d Euclidean loop quantum gravity in Smolin's weak coupling limit on the complete graph using variational Monte Carl…
Simultaneous approximation of multiple degenerate states using a single neural network quantum state
Waleed Sherif
Neural network quantum states (NQS) excel at approximating ground states of quantum many-body systems, but approximating all states of a degenerate manifold is nevertheless computa…
Deep learning spinfoam vertex amplitudes: the Euclidean Barrett-Crane model
Hanno Sahlmann, Waleed Sherif
Spinfoam theories propose a well-defined path-integral formulation for quantum gravity and are hoped to provide the dynamics of loop quantum gravity. However, it is computationally…