Noise-compensating pulses for electrostatically controlled silicon spin qubits

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • F. A. Calderon-Vargas
  • Muhed S. Rana
  • J. P. Kestner
  • Edwin Barnes
  • S. Das Sarma

Detail(s)

Original languageEnglish
Article number155306
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number15
Publication statusPublished - 14 Oct 2014
Externally publishedYes

Abstract

We study the performance of supcode - a family of dynamically correcting pulses designed to cancel simultaneously both Overhauser and charge noise for singlet-triplet spin qubits - adapted to silicon devices with electrostatic control. We consider both natural Si and isotope-enriched Si systems, and in each case we investigate the behavior of individual gates under static noise and perform randomized benchmarking to obtain the average gate error under realistic 1/f noise. We find that in most cases supcode pulses offer roughly an order of magnitude reduction in gate error, and especially in the case of isotope-enriched Si, supcode yields gate operations of very high fidelity. We also develop a version of supcode that cancels the charge noise only, "δJ-supcode," which is particularly beneficial for isotope-enriched Si devices where charge noise dominates Overhauser noise, offering a level of error reduction comparable to the original supcode while yielding gate times that are 30%-50% shorter. Our results show that the supcode noise-compensating pulses provide a fast, simple, and effective approach to error suppression, bringing gate errors well below the quantum error correction threshold in principle.

Citation Format(s)

Noise-compensating pulses for electrostatically controlled silicon spin qubits. / Wang, Xin; Calderon-Vargas, F. A.; Rana, Muhed S.; Kestner, J. P.; Barnes, Edwin; Das Sarma, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 15, 155306, 14.10.2014.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review