Few Electron Transfer using Helium-Channel CCDs

ORAL

Abstract

Electrons floating on liquid helium have been proposed as a promising candidate for quantum computing due to their predicted long spin coherence times [1] and high mobilities [2]. In addition, the exceptionally small spin-orbit coupling allows mobile electrons to retain their long spin coherence, enabling fast and coherent qubit transport. Charge-coupled devices (CCDs) have been shown to enable efficient clocked electron transport along gate-defined channels across the surface of superfluid helium [3]. Here, we demonstrate transfer of as few as 2 electrons across 6 gate-defined helium-filled channels using a 3-phase CCD. An electron sensitivity of 2 was achieved at a time constant of 1 second using a home-built cryogenic cascode amplifier circuit. The CCDs were fabricated using a complementary metal-oxide-semiconductor (CMOS) back end of line (BEOL) metallization process at the Sandia National Laboratories MESA fab.

[1] S. A. Lyon, Phys. Rev. A 74, 052338 (2006)

[2] Shirahama et al., J. Low Temp. Phys. 101, 439-444 (1995)

[3] Bradbury et al., Phys. Rev. Lett. 107, 266803 (2011)

*Supported by the U.S. DOE, BES under DE-SC0020136, and by the NQIS C2QA Center under DE-SC0012704. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.

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Publication: M. M. Feldman, G. Fuchs, T. Liu, L. A. D'Imperio, M. D. Henry, E. A. Shaner, S. A. Lyon, Sensing Few Electrons Floating on Helium with
High-Electron-Mobility Transistors, J. Low. Temp. Phys. (under review)

Presenters

  • Gordian Fuchs

    • Princeton University

Authors

  • Gordian Fuchs

    • Princeton University

  • Mayer M Feldman

    • Princeton University

  • Tiffany R Liu

    • Princeton University

  • Luke A D'Imperio

    • Sandia National Laboratories

  • M. David Henry

    • Sandia National Laboratories

  • Eric A Shaner

    • Sandia National Laboratories

  • Stephen A Lyon

    • Princeton University, EeroQ Quantum Hardware
    • Princeton University