Quantum Spacetime on a Quantum Simulator

[Lawrence Crowell]

This may be of interest to some. The Phys Org article is below and the technical publication follows.

LC

https://phys.org/news/2019-10-quantum-spacetime-simulator.html

https://arxiv.org/abs/1712.08711

Quantum Spacetime on a Quantum Simulator

Keren Li, Youning Li, Muxin Han, Sirui Lu, Jie Zhou, Dong Ruan, Guilu Long, Yidun Wan, Dawei Lu, Bei Zeng, Raymond Laflamme

(Submitted on 23 Dec 2017)

We experimentally simulate the spin networks -- a fundamental description of quantum spacetime at the Planck level. We achieve this by simulating quantum tetrahedra and their interactions. The tensor product of these quantum tetrahedra comprises spin networks. In this initial attempt to study quantum spacetime by quantum information processing, on a four-qubit nuclear magnetic resonance quantum simulator, we simulate the basic module -- comprising five quantum tetrahedra -- of the interactions of quantum spacetime. By measuring the geometric properties on the corresponding quantum tetrahedra and simulate their interactions, our experiment serves as the basic module that represents the Feynman diagram vertex in the spin-network formulation of quantum spacetime.

[Philip Thrift]

This could be the case: There will be a multitude of formulation that combine/mutate GR and QM into a simple formulation, but no definitive decision on which one the data prefers.

@philipthrift