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


Book Volume: 2

DOI: 10.1038/s42005-019-0218-5


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.

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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


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

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