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Breakthrough Quantum Lie Detector Validates 73-Qubit System

10/9/2025

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Summary

Story summary

Physicists from Leiden, Beijing, and Hangzhou developed a method to verify large quantum systems.
They tested a 73-qubit system using a Bell test dubbed a quantum lie detector.
The test confirms nonlocality across distance.
They used a special quantum state and certified genuine multipartite Bell correlations for up to 24 qubits, with energy measurements 48 standard deviations below classical predictions.

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Story summary

Physicists from Leiden, Beijing, and Hangzhou developed a method to verify large quantum systems.
They tested a 73-qubit system using a Bell test dubbed a quantum lie detector.
The test confirms nonlocality across distance.
They used a special quantum state and certified genuine multipartite Bell correlations for up to 24 qubits, with energy measurements 48 standard deviations below classical predictions.