Simulations of Charge Noise in Quantum Dot Qubits Due to Temperature Fluctuations

ORAL

Abstract

Silicon quantum dot qubits show great promise but suffer from charge noise. It has recently been proposed that 1/f-like noise spectra can emerge from very small numbers of thermally activated two-level fluctuators in the presence of significant temperature fluctuations [1]. We present the results of Monte Carlo simulations of the noise of a two-level system modeled as a Heisenberg spin with a barrier to spin re-orientations in a bath with a fluctuating temperature.

[1] S. Ahn et al., arXiv:2007.03689.

*University of California MRPI grant MRP-17-454755, and the National Science Foundation (NSF) through the University of Wisconsin Materials Research Science and Engineering Center (DMR-1720415). RW is supported by the Department of Energy (Grant No. DE-SC0019448).

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Presenters

  • Dan Mickelsen

    • Department of Physics and Astronomy, University of California, Irvine
    • University of California, Irvine

Authors

  • Dan Mickelsen

    • Department of Physics and Astronomy, University of California, Irvine
    • University of California, Irvine

  • Herve M. Carruzzo

    • Department of Physics and Astronomy, University of California, Irvine
    • University of California, Irvine

  • Ruqian Wu

    • Department of Physics and Astronomy, University of California, Irvine
    • Physics and Astronomy, University of California Irvine
    • University of California, Irvine

  • Clare Yu

    • Department of Physics and Astronomy, University of California, Irvine
    • University of California, Irvine

  • Sue Nan Coppersmith

    • School of Physics, University of New South Wales, Sydney, Australia
    • University of Wisconsin - Madison