A quantum processor based on coherent transport of entangled atom arrays.

Autor: Bluvstein D; Department of Physics, Harvard University, Cambridge, MA, USA., Levine H; Department of Physics, Harvard University, Cambridge, MA, USA.; AWS Center for Quantum Computing, Pasadena, CA, USA., Semeghini G; Department of Physics, Harvard University, Cambridge, MA, USA., Wang TT; Department of Physics, Harvard University, Cambridge, MA, USA., Ebadi S; Department of Physics, Harvard University, Cambridge, MA, USA., Kalinowski M; Department of Physics, Harvard University, Cambridge, MA, USA., Keesling A; Department of Physics, Harvard University, Cambridge, MA, USA.; QuEra Computing Inc., Boston, MA, USA., Maskara N; Department of Physics, Harvard University, Cambridge, MA, USA., Pichler H; Institute for Theoretical Physics, University of Innsbruck, Innsbruck, Austria.; Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, Innsbruck, Austria., Greiner M; Department of Physics, Harvard University, Cambridge, MA, USA., Vuletić V; Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA., Lukin MD; Department of Physics, Harvard University, Cambridge, MA, USA. lukin@physics.harvard.edu.
Jazyk: angličtina
Zdroj: Nature [Nature] 2022 Apr; Vol. 604 (7906), pp. 451-456. Date of Electronic Publication: 2022 Apr 20.
DOI: 10.1038/s41586-022-04592-6
Abstrakt: The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is key for building scalable quantum information systems 1,2 . In most state-of-the-art approaches, qubits interact locally, constrained by the connectivity associated with their fixed spatial layout. Here we demonstrate a quantum processor with dynamic, non-local connectivity, in which entangled qubits are coherently transported in a highly parallel manner across two spatial dimensions, between layers of single- and two-qubit operations. Our approach makes use of neutral atom arrays trapped and transported by optical tweezers; hyperfine states are used for robust quantum information storage, and excitation into Rydberg states is used for entanglement generation 3-5 . We use this architecture to realize programmable generation of entangled graph states, such as cluster states and a seven-qubit Steane code state 6,7 . Furthermore, we shuttle entangled ancilla arrays to realize a surface code state with thirteen data and six ancillary qubits 8 and a toric code state on a torus with sixteen data and eight ancillary qubits 9 . Finally, we use this architecture to realize a hybrid analogue-digital evolution 2 and use it for measuring entanglement entropy in quantum simulations 10-12 , experimentally observing non-monotonic entanglement dynamics associated with quantum many-body scars 13,14 . Realizing a long-standing goal, these results provide a route towards scalable quantum processing and enable applications ranging from simulation to metrology.
(© 2022. The Author(s).)
Databáze: MEDLINE
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