Asymmetric Blockade and Multiqubit Gates via Dipole-Dipole Interactions

Young, Jeremy T.; Bienias, Przemyslaw; Belyansky, Ron; Kaufman, Adam M.; Gorshkov, Alexey V.

doi:10.1103/physrevlett.127.120501

Asymmetric Blockade and Multiqubit Gates via Dipole-Dipole Interactions

Journal Article · Fri Sep 17 00:00:00 EDT 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.127.120501· OSTI ID:1852784

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JILA, Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Joint Quantum Institute, College Park, MD (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States); OSTI
Joint Center for Quantum Information and Computer Science, College Park, MD (United States); National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States); Joint Center for Quantum Information and Computer Science, College Park, MD (United States)
JILA, Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States)

Because of their strong and tunable interactions, Rydberg atoms can be used to realize fast two-qubit entangling gates. We propose a generalization of a generic two-qubit Rydberg-blockade gate to multiqubit Rydberg-blockade gates that involve both many control qubits and many target qubits simultaneously. This is achieved by using strong microwave fields to dress nearby Rydberg states, leading to asymmetric blockade in which control-target interactions are much stronger than control-control and target-target interactions. Further, the implementation of these multiqubit gates can drastically simplify both quantum algorithms and state preparation. To illustrate this, we show that a 25-atom Greenberger-Horne-Zeilinger state can be created using only three gates with an error of 5.8%.

View Accepted Manuscript (DOE)

Research Organization:: Duke Univ., Durham, NC (United States); Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: Fonds de recherche du Québec – Nature et technologies (FRQNT); National Institute of Standards and Technology (NIST); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); US Air Force Office of Scientific Research (AFOSR); US Army Research Laboratory (USARL); US Army Research Office (ARO); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: SC0019040; SC0019449; SC0020312

OSTI ID:: 1852784

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 127; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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