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Diabatic Gates for Frequency-Tunable Superconducting Qubits.
Barends, R; Quintana, C M; Petukhov, A G; Chen, Yu; Kafri, D; Kechedzhi, K; Collins, R; Naaman, O; Boixo, S; Arute, F; Arya, K; Buell, D; Burkett, B; Chen, Z; Chiaro, B; Dunsworth, A; Foxen, B; Fowler, A; Gidney, C; Giustina, M; Graff, R; Huang, T; Jeffrey, E; Kelly, J; Klimov, P V; Kostritsa, F; Landhuis, D; Lucero, E; McEwen, M; Megrant, A; Mi, X; Mutus, J; Neeley, M; Neill, C; Ostby, E; Roushan, P; Sank, D; Satzinger, K J; Vainsencher, A; White, T; Yao, J; Yeh, P; Zalcman, A; Neven, H; Smelyanskiy, V N; Martinis, John M.
Affiliation
  • Barends R; Google, Santa Barbara, California 93117, USA.
  • Quintana CM; Google, Santa Barbara, California 93117, USA.
  • Petukhov AG; Google, Venice, California 90291, USA.
  • Chen Y; Google, Santa Barbara, California 93117, USA.
  • Kafri D; Google, Venice, California 90291, USA.
  • Kechedzhi K; Google, Venice, California 90291, USA.
  • Collins R; Google, Santa Barbara, California 93117, USA.
  • Naaman O; Google, Santa Barbara, California 93117, USA.
  • Boixo S; Google, Venice, California 90291, USA.
  • Arute F; Google, Santa Barbara, California 93117, USA.
  • Arya K; Google, Santa Barbara, California 93117, USA.
  • Buell D; Google, Santa Barbara, California 93117, USA.
  • Burkett B; Google, Santa Barbara, California 93117, USA.
  • Chen Z; Google, Santa Barbara, California 93117, USA.
  • Chiaro B; Department of Physics, University of California, Santa Barbara, California 93106, USA.
  • Dunsworth A; Google, Santa Barbara, California 93117, USA.
  • Foxen B; Department of Physics, University of California, Santa Barbara, California 93106, USA.
  • Fowler A; Google, Santa Barbara, California 93117, USA.
  • Gidney C; Google, Santa Barbara, California 93117, USA.
  • Giustina M; Google, Santa Barbara, California 93117, USA.
  • Graff R; Google, Santa Barbara, California 93117, USA.
  • Huang T; Google, Santa Barbara, California 93117, USA.
  • Jeffrey E; Google, Santa Barbara, California 93117, USA.
  • Kelly J; Google, Santa Barbara, California 93117, USA.
  • Klimov PV; Google, Santa Barbara, California 93117, USA.
  • Kostritsa F; Google, Santa Barbara, California 93117, USA.
  • Landhuis D; Google, Santa Barbara, California 93117, USA.
  • Lucero E; Google, Santa Barbara, California 93117, USA.
  • McEwen M; Department of Physics, University of California, Santa Barbara, California 93106, USA.
  • Megrant A; Google, Santa Barbara, California 93117, USA.
  • Mi X; Google, Santa Barbara, California 93117, USA.
  • Mutus J; Google, Santa Barbara, California 93117, USA.
  • Neeley M; Google, Santa Barbara, California 93117, USA.
  • Neill C; Google, Santa Barbara, California 93117, USA.
  • Ostby E; Google, Venice, California 90291, USA.
  • Roushan P; Google, Santa Barbara, California 93117, USA.
  • Sank D; Google, Santa Barbara, California 93117, USA.
  • Satzinger KJ; Google, Santa Barbara, California 93117, USA.
  • Vainsencher A; Google, Santa Barbara, California 93117, USA.
  • White T; Google, Santa Barbara, California 93117, USA.
  • Yao J; Google, Santa Barbara, California 93117, USA.
  • Yeh P; Google, Santa Barbara, California 93117, USA.
  • Zalcman A; Google, Santa Barbara, California 93117, USA.
  • Neven H; Google, Venice, California 90291, USA.
  • Smelyanskiy VN; Google, Venice, California 90291, USA.
  • Martinis JM; Google, Santa Barbara, California 93117, USA.
Phys Rev Lett ; 123(21): 210501, 2019 Nov 22.
Article in En | MEDLINE | ID: mdl-31809160
ABSTRACT
We demonstrate diabatic two-qubit gates with Pauli error rates down to 4.3(2)×10^{-3} in as fast as 18 ns using frequency-tunable superconducting qubits. This is achieved by synchronizing the entangling parameters with minima in the leakage channel. The synchronization shows a landscape in gate parameter space that agrees with model predictions and facilitates robust tune-up. We test both iswap-like and cphase gates with cross-entropy benchmarking. The presented approach can be extended to multibody operations as well.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2019 Document type: Article Affiliation country:
Fulltext
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2019 Document type: Article Affiliation country: