Data and plotting code for 'Mid-circuit correction of correlated phase errors using an array of spectator qubits'

Singh, Kevin; Bradley, Curtis A.; Anand, Shraddha; Ramesh, V.; White, R.; Bernien, Hannes

doi:10.5281/zenodo.7612718

Cited by 1 publication

(3 citation statements)

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“…The methods demonstrated in this work constitute a set of quantum-control techniques that are essential for atom-array quantum processors, including MCR, feedforward operations, and the reloading of auxiliary qubits while maintaining quantum data. Combining these capabilities with programmable intraspecies ( 9 , 38 ) and interspecies Rydberg gates will enable auxiliary qubit–assisted measurements as required for quantum error correction ( 32 , 33 , 39 ) and efficient preparation of long-range entangled states ( 40 ). These same capabilities also enable the exploration of complex dynamical quantum behavior under continuous observation, including measurement-induced phase transitions ( 41 ).…”

Section: Discussion and Outlookmentioning

confidence: 99%

“…Note added in proof: After the consideration of this manuscript, a preprint paper was published that describes MCR of a neutral atom by shelving in hyperfine states ( 42 ).…”

Section: Discussion and Outlookmentioning

confidence: 99%

“…Data and materials availability: The data and code supporting this study are available at Zenodo ( 43 ).…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Mid-circuit correction of correlated phase errors using an array of spectator qubits

Singh

Bradley

Anand

et al. 2023

Science

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Scaling up invariably error-prone quantum processors is a formidable challenge. Although quantum error correction ultimately promises fault-tolerant operation, the required qubit overhead and error thresholds are daunting. In a complementary proposal, co-located, auxiliary ‘spectator’ qubits act as in-situ probes of noise, and enable real-time, coherent corrections of data qubit errors. We use an array of cesium spectator qubits to correct correlated phase errors on an array of rubidium data qubits. By combining in-sequence readout, data processing, and feed-forward operations, these correlated errors are suppressed within the execution of the quantum circuit. The protocol is broadly applicable to quantum information platforms, and establishes key tools for scaling neutral-atom quantum processors: mid-circuit readout of atom arrays, real-time processing and feed-forward, and coherent mid-circuit reloading of atomic qubits.

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Section: Discussion and Outlookmentioning

confidence: 99%

“…Note added in proof: After the consideration of this manuscript, a preprint paper was published that describes MCR of a neutral atom by shelving in hyperfine states ( 42 ).…”

Section: Discussion and Outlookmentioning

confidence: 99%