Closing objectivity loophole in Bell tests on a public quantum computer
Quantum Physics
2025-06-27 v2
Abstract
We have constructed and run a Bell test of local realism focusing on the objectivity criterion. The objectivity means that the outcomes are confirmed macroscopically by a few observers at each party. The IBM Quantum and IonQ devices turn out to be sufficiently accurate to pass such an extended Bell-type test, although at the price of communication loopholes and residual but statistically significant signaling. The test also serves as the benchmark of entanglement spread across larger sets of qubits.
Cite
@article{arxiv.2506.08940,
title = {Closing objectivity loophole in Bell tests on a public quantum computer},
author = {Adam Bednorz and Josep Batle and Tomasz Białecki and Jarosław K. Korbicz},
journal= {arXiv preprint arXiv:2506.08940},
year = {2025}
}
Comments
13 pages, 12 figures, 7 tables