75 citations · 249 across the 15 of their papers we have counts for
13 papers · 1 filter
Causal structure and topology change in (2+1)-dimensional simplicial gravity
Seth K. Asante, Björn Borgolte
We develop a systematic method for analyzing the causal structure at vertices in (2+1)-dimensional Lorentzian simplicial gravity. By examining the intersection patterns of lightcon…
Efficient Tensor Network Algorithms for Spin Foam Models
Seth K. Asante, Sebastian Steinhaus
Numerical computations and methods have become increasingly crucial in the study of spin foam models across various regimes. This paper adds to this field by introducing new algori…
Solving the area-length systems in discrete gravity using homotopy continuation
Seth K. Asante, Taylor Brysiewicz
Area variables are intrinsic to connection formulations of general relativity, in contrast to the fundamental length variables prevalent in metric formulations. Within 4D discrete…
Spin foams, Refinement limit and Renormalization
Seth K. Asante, Bianca Dittrich, Sebastian Steinhaus
Spin foams provide path integrals for quantum gravity, which employ discretizations as regulator. To obtain regulator independent predictions, we must remove these fiducial structu…
Spin-foams as semi-classical vertices: gluing constraints and a hybrid algorithm
Seth K. Asante, José Diogo Simão, Sebastian Steinhaus
Numerical methods in spin-foam models have significantly advanced in the last few years, yet challenges remain in efficiently extracting results for amplitudes with many quantum de…
Perfect discretizations as a gateway to one-loop partition functions for 4D gravity
Seth K. Asante, Bianca Dittrich
Lattice actions and amplitudes that perfectly mirror continuum physics are known as perfect discretizations. Such perfect discretizations naturally preserve the symmetries of the c…
Complex actions and causality violations: Applications to Lorentzian quantum cosmology
Seth K. Asante, Bianca Dittrich, José Padua-Argüelles
For the construction of the Lorentzian path integral for gravity one faces two main questions: Firstly, what configurations to include, in particular whether to allow Lorentzian me…
Effective Spin Foam Models for Lorentzian Quantum Gravity
Seth K. Asante, Bianca Dittrich, José Padua-Arguelles
Making the Lorentzian path integral for quantum gravity well-defined and computable has been a long standing challenge. In this work we adopt the recently proposed effective spin f…
Discrete gravity dynamics from effective spin foams
Seth K. Asante, Bianca Dittrich, Hal M. Haggard
The first computation of a spin foam dynamics that provides a test of the quantum equations of motions of gravity is presented. Specifically, a triangulation that includes an inner…
Effective Spin Foam Models for Four-Dimensional Quantum Gravity
Seth K. Asante, Bianca Dittrich, Hal M. Haggard
A number of approaches to four-dimensional quantum gravity, such as loop quantum gravity and holography, situate areas as their fundamental variables. However, this choice of kinem…
Quantum geometry from higher gauge theory
Seth K. Asante, Bianca Dittrich, Florian Girelli +2
Higher gauge theories play a prominent role in the construction of 4d topological invariants and have been long ago proposed as a tool for 4d quantum gravity. The Yetter lattice mo…
Holographic formulation of 3D metric gravity with finite boundaries
Seth K. Asante, Bianca Dittrich, Florian Hopfmueller
In this work we construct holographic boundary theories for linearized 3D gravity, for a general family of finite or quasi-local boundaries. These boundary theories are directly de…
The Degrees of Freedom of Area Regge Calculus: Dynamics, Non-metricity, and Broken Diffeomorphisms
Seth K. Asante, Bianca Dittrich, Hal M. Haggard
Discretization of general relativity is a promising route towards quantum gravity. Discrete geometries have a finite number of degrees of freedom and can mimic aspects of quantum g…