Sensor-assisted fault mitigation in quantum computation

Abstract

We propose a method to assist fault mitigation in quantum computation through the use of sensors co-located near physical qubits. Specifically, we consider using transition edge sensors co-located on silicon substrates hosting superconducting qubits to monitor for energy injection from ionizing radiation, which has been demonstrated to increase decoherence in transmon qubits. We generalize from these two physical device concepts and explore the potential advantages of co-located sensors to assist fault mitigation in quantum computation. In the simplest scheme, co-located sensors beneficially assist rejection of calculations potentially affected by environmental disturbances. Investigating the potential computational advantage further required development of an extension to the standard formulation of quantum error correction. In a specific case of the standard three-qubit, bit-flip quantum error correction code, we show that given a 20% overall error probability per qubit, approximately 90% of repeated calculation attempts are correctable. However, when sensor-detectable errors account for 45% of overall error probability, the use of co-located sensors uniquely associated with independent qubits boosts the fraction of correct final-state calculations to 96%, at the cost of rejecting 7% of repeated calculation attempts.

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Cited by in corpus (9)

• TLS Dynamics in a Superconducting Qubit Due to Background Ionizing Radiation
• Transition Edge Sensors: Physics and Applications
• Disentangling the sources of ionizing radiation in superconducting qubits
• Cosmic-ray-induced correlated errors in superconducting qubit array
• Spectroscopic measurements and models of energy deposition in the substrate of quantum circuits by natural ionizing radiation
• Abatement of Ionizing Radiation for Superconducting Quantum Devices
• Averting multi-qubit burst errors in surface code magic state factories
• Quantum-network nodes with real-time noise mitigation using spectator qubits
• Conceptual study of a two-layer silicon pixel detector to tag the passage of muons from cosmic sources through quantum processors