Logical quantum processor based on reconfigurable atom arrays

Abstract Suppressing errors is the central challenge for useful quantum computing 1 , requiring quantum error correction (QEC) 2–6 for large-scale processing. However, the overhead in the realization of error-corrected ‘logical’ qubits, in which information is encoded across many physical qubits for redundancy 2–4 , poses substantial challenges to large-scale logical quantum computing. Here we report the realization of a programmable quantum processor based on encoded logical qubits operating with up to 280 physical qubits. Using logical-level control and a zoned architecture in reconfigurable neutral-atom arrays 7 , our system combines high two-qubit gate fidelities 8 , arbitrary connectivity 7,9 , as well as…

• NS
  National Science Foundation

  Awards: DGE1745303, 2120757, OMA-2120757, W911NF-20-1-0082
• UD
  U.S. Department of Defense
• UD
  U.S. Department of Energy

  Awards: OMA-2120757, DE-SC0020347, DE-SC0021110, SC0021110
• NI
  National Institute of Standards and Technology

  Award: OMA-2120757
• DA
  Defense Advanced Research Projects Agency

  Award: W911NF2010021
• IA
  Intelligence Advanced Research Projects Activity

  Award: W911NF-23-2-0219
• ND
  National Defense Science and Engineering Graduate
• MU
  Multidisciplinary University Research Initiative

  Award: W911NF-20-1-0082
• CF
  Center for Ultracold Atoms, Massachusetts Institute of Technology
• AR
  Army Research Office

  Awards: W911NF-20-1-0082, W911NF, W911NF-23-2-0219