Closing the Objectivity Loophole in Bell Tests on a Public Quantum Computer
Abstract
ABSTRACT We have constructed and run a Bell test of local realism focusing on the objectivity criterion. Objectivity means that the outcomes are macroscopically confirmed 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 a benchmark of entanglement spread across larger sets of qubits.
Fields of Study & Subjects
Quantum Mechanics and Applications
Quantum Information and Cryptography
Quantum Computing Algorithms and Architecture
Publication details
- Journal / source
- Advanced Quantum Technologies
- Volume
- 9
- Issue
- 9
- Publication date
- 30 August 2026
- Language
- EN