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Two-qubit entangling gates within arbitrarily long chains of trapped ions

Publication ,  Journal Article
Landsman, KA; Wu, Y; Leung, PH; Zhu, D; Linke, NM; Brown, KR; Duan, L; Monroe, C
Published in: Physical Review A
August 26, 2019

Ion trap quantum computers are based on modulating the Coulomb interaction between atomic ion qubits using external forces. However, the spectral crowding of collective motional modes could pose a challenge to the control of such interactions for large numbers of qubits. Here, we show that high-fidelity quantum gate operations are still possible with very large trapped ion crystals by using a small and fixed number of motional modes, simplifying the scaling of ion trap quantum computers. We present analytical work that shows that gate operations need not couple to the motion of distant ions, allowing parallel entangling gates with a crosstalk error that falls off as the inverse cube of the distance between the pairs. We also experimentally demonstrate high-fidelity entangling gates on a fully connected set of seventeen Yb+171 qubits using simple laser pulse shapes that primarily couple to just a few modes.

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Published In

Physical Review A

DOI

EISSN

2469-9934

ISSN

2469-9926

Publication Date

August 26, 2019

Volume

100

Issue

2

Related Subject Headings

  • 51 Physical sciences
  • 49 Mathematical sciences
  • 34 Chemical sciences
 

Citation

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Landsman, K. A., Wu, Y., Leung, P. H., Zhu, D., Linke, N. M., Brown, K. R., … Monroe, C. (2019). Two-qubit entangling gates within arbitrarily long chains of trapped ions. Physical Review A, 100(2). https://doi.org/10.1103/PhysRevA.100.022332
Landsman, K. A., Y. Wu, P. H. Leung, D. Zhu, N. M. Linke, K. R. Brown, L. Duan, and C. Monroe. “Two-qubit entangling gates within arbitrarily long chains of trapped ions.” Physical Review A 100, no. 2 (August 26, 2019). https://doi.org/10.1103/PhysRevA.100.022332.
Landsman KA, Wu Y, Leung PH, Zhu D, Linke NM, Brown KR, et al. Two-qubit entangling gates within arbitrarily long chains of trapped ions. Physical Review A. 2019 Aug 26;100(2).
Landsman, K. A., et al. “Two-qubit entangling gates within arbitrarily long chains of trapped ions.” Physical Review A, vol. 100, no. 2, Aug. 2019. Scopus, doi:10.1103/PhysRevA.100.022332.
Landsman KA, Wu Y, Leung PH, Zhu D, Linke NM, Brown KR, Duan L, Monroe C. Two-qubit entangling gates within arbitrarily long chains of trapped ions. Physical Review A. 2019 Aug 26;100(2).

Published In

Physical Review A

DOI

EISSN

2469-9934

ISSN

2469-9926

Publication Date

August 26, 2019

Volume

100

Issue

2

Related Subject Headings

  • 51 Physical sciences
  • 49 Mathematical sciences
  • 34 Chemical sciences