4.5 Article

Digital quantum simulation of quantum gravitational entanglement with IBM quantum computers

Journal

EPJ QUANTUM TECHNOLOGY
Volume 10, Issue 1, Pages -

Publisher

SPRINGER
DOI: 10.1140/epjqt/s40507-023-00161-6

Keywords

Quantum simulation; Quantum computation; Quantum gravity

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We report a digital quantum simulation of a hamiltonian that generates quantum entanglement through gravitational means. Specifically, we focus on a pair of quantum harmonic oscillators, which interact via a quantum gravitational field to produce single-mode squeezing simultaneously in both modes, a non-standard process in quantum optics. By employing a boson-qubit mapping and a digital gate decomposition tailored for IBM quantum devices, we mitigate errors and use post-selection to achieve high-fidelity simulations in a parameter regime that is beyond direct experimental reach.
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.

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