First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility
This paper reports the first measurement of space- and time-correlated charge noise in superconducting qubits at an underground facility, demonstrating that while shielding and depth significantly reduce the rate of radiation-induced charge jumps compared to surface tests, the observed rate remains higher than expected from ambient gamma reduction alone, yet allows for over 22 hours of operation with zero correlated jumps at millimeter scales.
G. Bratrud, S. Lewis, K. Anyang, A. Colón Cesaní, T. Dyson, H. Magoon, D. Sabhari, G. Spahn, G. Wagner, R. Gualtieri, N. A. Kurinsky, R. Linehan, R. McDermott, S. Sussman, D. J. Temples, S. Uemura, C. (…)2026-06-01⚛️ hep-ex