Lattice surgery realized on two distance-three repetition codes with superconducting qubits

Abstract Quantum error correction is needed for quantum computers to be capable of executing algorithms using hundreds of logical qubits in a fault-tolerant manner. Recent experiments have progressed towards this by demonstrating sufficiently low error rates for state preservation of a single logical qubit. However, quantum computation algorithms also require that these logical qubits can be entangled and that gate operations can be performed on them. Lattice surgery is a technique that offers a practical approach for implementing such gates, particularly in planar quantum processor layouts. Here we demonstrate lattice surgery between two distance-three repetition-code qubits by splitting a single…

• DF
  Deutsche Forschungsgemeinschaft

  Awards: EXC 2004/1, ML4Q EXC 2004/1 39053476, 390534769
• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

  Awards: R’equip grant 206021-170731, 206021, 206021-170731, 170731
• ET
  Eidgenössische Technische Hochschule Zürich
• BS
  Baugarten Stiftung
• EZ
  ETH Zürich Foundation
• I-
  Innosuisse - Schweizerische Agentur für Innovationsförderung
• IA
  Intelligence Advanced Research Projects Activity

  Award: W911NF-23-2-021
• SF
  Staatssekretariat für Bildung, Forschung und Innovation
• AR
  Army Research Office

  Awards: W911NF-23-2-0212, W911NF