Quantum spacetime on a quantum simulator

Li K, Li Y, Han M, Lu S, Zhou J, Ruan D, Long G, Wan Y, Lu D, Zeng B, Laflamme R (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Communications Physics Springer Nature

Book Volume: 2

DOI: 10.1038/s42005-019-0218-5

Abstract

Quantum simulation has shown its irreplaceable role in many fields, where it is difficult for classical computers to do much. On a four-qubit Nuclear Magnetic Resonance (NMR) quantum simulator, we experimentally simulate the spin-network states by simulating quantum spacetime tetrahedra. The fidelities of our experimentally prepared quantum tetrahedra are all above 95%. We then use the quantum tetradedra prepared by the Nuclear Magnetic Resonance to simulate a spinfoam vertex amplitude, which displays the local dynamics of quantum spacetime. By measuring the geometric properties on the corresponding quantum tetrahedra and simulating their interaction, our experiment serves as a basic module that represents the Feynman diagram vertex in the spinfoam formulation of Loop Quantum Gravity(LQG). This is an initial attempt to study LQG by quantum information processing.

Authors with CRIS profile

Muxin Han Chair for Theoretical Physics III (Quantum Gravity)

Involved external institutions

Peng Cheng Laboratory CN China (CN) University of Waterloo (UW) CA Canada (CA) Tsinghua University CN China (CN) Perimeter Institute for Theoretical Physics CA Canada (CA)

How to cite

APA:

Li, K., Li, Y., Han, M., Lu, S., Zhou, J., Ruan, D.,... Laflamme, R. (2019). Quantum spacetime on a quantum simulator. Communications Physics, 2. https://dx.doi.org/10.1038/s42005-019-0218-5

MLA:

Li, Keren, et al. "Quantum spacetime on a quantum simulator." Communications Physics 2 (2019).

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