[Publication] Associate Professor Daisuke Kadoh (Faculty of Mathematical Informatics) has published a paper in Physical Review D

The paper titled”Pinched geometries in 2D Lorentzian quantum Regge calculus ” is now available in Physical Review D

Quantum gravity, which aims to understand gravity from a quantum perspective, is one of the most important unsolved problems in modern physics. In this study, we used a numerical method called tensor networks to investigate a Lorentzian quantum Regge calculus, which is one of the candidate theories of quantum gravity.
This model has long been known to suffer from a problem called “pinched geometries,” in which space becomes unnaturally squeezed; however, our calculations show that this problem is suppressed.
These results suggest that Lorentzian quantum Regge calculus may lead to a quantum theory of gravity that describes smooth spacetime, and they open a new path for applying tensor networks to research in quantum gravity.