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First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility

Fuente: arXiv

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Bibliographic Details
Main Authors:	Bratrud, G., Lewis, S., Anyang, K., Cesaní, A. Colón, Dyson, T., Magoon, H., Sabhari, D., Spahn, G., Wagner, G., Gualtieri, R., Kurinsky, N. A., Linehan, R., McDermott, R., Sussman, S., Temples, D. J., Uemura, S., Bathurst, C., Cancelo, G., Chen, R., Chou, A., Hernandez, I., Hollister, M., Hsu, L., James, C., Kennard, K., Khatiwada, R., Lukens, P., Novati, V., Raha, N., Ray, S., Ren, R., Rodriguez, A., Schmidt, B., Stifter, K., Yu, J., Baxter, D., Figueroa-Feliciano, E., Bowring, D.
Format:	Preprint
Published:	2024
Subjects:	Quantum Physics High Energy Physics - Experiment Instrumentation and Detectors
Online Access:	Acceder al recurso
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_version_	1866916062032822272
author	Bratrud, G. Lewis, S. Anyang, K. Cesaní, A. Colón Dyson, T. Magoon, H. Sabhari, D. Spahn, G. Wagner, G. Gualtieri, R. Kurinsky, N. A. Linehan, R. McDermott, R. Sussman, S. Temples, D. J. Uemura, S. Bathurst, C. Cancelo, G. Chen, R. Chou, A. Hernandez, I. Hollister, M. Hsu, L. James, C. Kennard, K. Khatiwada, R. Lukens, P. Novati, V. Raha, N. Ray, S. Ren, R. Rodriguez, A. Schmidt, B. Stifter, K. Yu, J. Baxter, D. Figueroa-Feliciano, E. Bowring, D.
author_facet	Bratrud, G. Lewis, S. Anyang, K. Cesaní, A. Colón Dyson, T. Magoon, H. Sabhari, D. Spahn, G. Wagner, G. Gualtieri, R. Kurinsky, N. A. Linehan, R. McDermott, R. Sussman, S. Temples, D. J. Uemura, S. Bathurst, C. Cancelo, G. Chen, R. Chou, A. Hernandez, I. Hollister, M. Hsu, L. James, C. Kennard, K. Khatiwada, R. Lukens, P. Novati, V. Raha, N. Ray, S. Ren, R. Rodriguez, A. Schmidt, B. Stifter, K. Yu, J. Baxter, D. Figueroa-Feliciano, E. Bowring, D.
contents	We measure space- and time-correlated charge jumps on a four-qubit device, operating 107 meters below the Earth's surface in a low-radiation, cryogenic facility designed for the characterization of low-threshold particle detectors. The rock overburden of this facility reduces the cosmic ray muon flux by over 99% compared to laboratories at sea level. Combined with 4$π$ coverage of a movable lead shield, this facility enables quantifiable control over the flux of ionizing radiation on the qubit device. Long-time-series charge tomography measurements on these weakly charge-sensitive qubits capture discontinuous jumps in the induced charge on the qubit islands, corresponding to the interaction of ionizing radiation with the qubit substrate. The rate of these charge jumps scales with the flux of ionizing radiation on the qubit package, as characterized by a series of independent measurements on another energy-resolving detector operating simultaneously in the same cryostat with the qubits. Using lead shielding, we achieve a minimum charge jump rate of 0.19$^{+0.04}_{-0.03}$ mHz, almost an order of magnitude lower than that measured in surface tests, but a factor of roughly eight higher than expected based on reduction of ambient gammas alone. We operate four qubits for over 22 consecutive hours with zero correlated charge jumps at length scales above three millimeters.
format	Preprint
id	arxiv_https___arxiv_org_abs_2405_04642
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility Bratrud, G. Lewis, S. Anyang, K. Cesaní, A. Colón Dyson, T. Magoon, H. Sabhari, D. Spahn, G. Wagner, G. Gualtieri, R. Kurinsky, N. A. Linehan, R. McDermott, R. Sussman, S. Temples, D. J. Uemura, S. Bathurst, C. Cancelo, G. Chen, R. Chou, A. Hernandez, I. Hollister, M. Hsu, L. James, C. Kennard, K. Khatiwada, R. Lukens, P. Novati, V. Raha, N. Ray, S. Ren, R. Rodriguez, A. Schmidt, B. Stifter, K. Yu, J. Baxter, D. Figueroa-Feliciano, E. Bowring, D. Quantum Physics High Energy Physics - Experiment Instrumentation and Detectors We measure space- and time-correlated charge jumps on a four-qubit device, operating 107 meters below the Earth's surface in a low-radiation, cryogenic facility designed for the characterization of low-threshold particle detectors. The rock overburden of this facility reduces the cosmic ray muon flux by over 99% compared to laboratories at sea level. Combined with 4$π$ coverage of a movable lead shield, this facility enables quantifiable control over the flux of ionizing radiation on the qubit device. Long-time-series charge tomography measurements on these weakly charge-sensitive qubits capture discontinuous jumps in the induced charge on the qubit islands, corresponding to the interaction of ionizing radiation with the qubit substrate. The rate of these charge jumps scales with the flux of ionizing radiation on the qubit package, as characterized by a series of independent measurements on another energy-resolving detector operating simultaneously in the same cryostat with the qubits. Using lead shielding, we achieve a minimum charge jump rate of 0.19$^{+0.04}_{-0.03}$ mHz, almost an order of magnitude lower than that measured in surface tests, but a factor of roughly eight higher than expected based on reduction of ambient gammas alone. We operate four qubits for over 22 consecutive hours with zero correlated charge jumps at length scales above three millimeters.
title	First Measurement of Correlated Charge Noise in Superconducting Qubits at an Underground Facility
topic	Quantum Physics High Energy Physics - Experiment Instrumentation and Detectors
url	https://arxiv.org/abs/2405.04642