Scalable Quantum Circuit and Control for a Superconducting Surface Code

Richard Versluis, Stefano Poletto, Nader Khammassi, Brian Tarasinski, Nadia Haider, Dave Michalak, Alessandro Bruno, Koen Bertels, L. DiCarlo

Research output: Contribution to journalArticleScientificpeer-review

118 Citations (Scopus)
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We present a scalable scheme for executing the error-correction cycle of a monolithic surface-code fabric composed of fast-flux-tunable transmon qubits with nearest-neighbor coupling. An eight-qubit unit cell forms the basis for repeating both the quantum hardware and coherent control, enabling spatial multiplexing. This control uses three fixed frequencies for all single-qubit gates and a unique frequency-detuning pattern for each qubit in the cell. By pipelining the interaction and readout steps of ancilla-based X- and Z-type stabilizer measurements, we can engineer detuning patterns that avoid all second-order transmon-transmon interactions except those exploited in controlled-phase gates, regardless of fabric size. Our scheme is applicable to defect-based and planar logical qubits, including lattice surgery.

Original languageEnglish
Article number034021
Pages (from-to)034021/1-034021/7
Number of pages7
JournalPhysical Review Applied
Issue number3
Publication statusPublished - 2017


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