https://doi.org/10.1140/epjqt/s40507-024-00242-0
Research
Digital quantum simulation of gravitational optomechanics with IBM quantum computers
1
Instituto de Física Teórica, UAM/CSIC, C/ Nicolás Cabrera 13-15, Campus de Cantoblanco, 28049, Madrid, Spain
2
Van Swinderen Institute for Particle Physics and Gravity, University of Groningen, 9747AG, Groningen, The Netherlands
3
Department of Physics and Astronomy, University College London, WC1E 6BT, London, United Kingdom
4
Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049, Madrid, Spain
Received:
15
February
2024
Accepted:
9
April
2024
Published online:
24
April
2024
We showcase the digital quantum simulation of the action of a Hamiltonian that governs the interaction between a quantum mechanical oscillator and an optical field, generating quantum entanglement between them via gravitational effects. This is achieved by making use of a boson-qubit mapping protocol and a digital gate decomposition that allow us to run the simulations in the quantum computers available in the IBM Quantum platform. We present the obtained results for the fidelity of the experiment in two different quantum computers, after applying error mitigation and post-selection techniques. The achieved results correspond to fidelities over 90%, which indicates that we were able to perform a faithful digital quantum simulation of the interaction and therefore of the generation of quantum entanglement by gravitational means in optomechanical systems.
Key words: Quantum simulation / Quantum computation / Quantum gravity
© The Author(s) 2024
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