Bias in Error-Corrected Quantum Sensing

Ivan Rojkov, David Layden, Paola Cappellaro, Jonathan Home, and Florentin Reiter
Phys. Rev. Lett. 128, 140503 – Published 6 April 2022
PDFHTMLExport Citation

Abstract

The sensitivity afforded by quantum sensors is limited by decoherence. Quantum error correction (QEC) can enhance sensitivity by suppressing decoherence, but it has a side effect: it biases a sensor’s output in realistic settings. If unaccounted for, this bias can systematically reduce a sensor’s performance in experiment, and also give misleading values for the minimum detectable signal in theory. We analyze this effect in the experimentally motivated setting of continuous-time QEC, showing both how one can remedy it, and how incorrect results can arise when one does not.

  • Figure
  • Figure
  • Received 22 January 2021
  • Revised 21 December 2021
  • Accepted 28 January 2022

DOI:https://doi.org/10.1103/PhysRevLett.128.140503

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

Ivan Rojkov1,*, David Layden2,†, Paola Cappellaro2, Jonathan Home1, and Florentin Reiter1,‡

  • 1Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
  • 2Research Laboratory of Electronics and Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • *irojkov@ethz.ch
  • Present address: IBM Quantum, Almaden Research Center, San Jose, California 95120, USA.
  • freiter@phys.ethz.ch

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 128, Iss. 14 — 8 April 2022

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×