Digital quantum simulation of quantum gravitational entanglement with IBM quantum computers
Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049, Madrid, Spain
Accepted: 26 January 2023
Published online: 8 February 2023
We report the digital quantum simulation of a hamiltonian involved in the generation of quantum entanglement by gravitational means. In particular, we focus on a pair of quantum harmonic oscillators, whose interaction via a quantum gravitational field generates single-mode squeezing in both modes at the same time, a non-standard process in quantum optics. We perform a boson-qubit mapping and a digital gate decomposition specific for IBM quantum devices. We use error mitigation and post-selection to achieve high-fidelity, accessing a parameter regime out of direct experimental reach.
Key words: Quantum simulation / Quantum computation / Quantum gravity
© The Author(s) 2023
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