Characterization and correction of the pulse width effects on quantum sensing experiments using solid-state spin qubits

Jungbae Yoon, Kihwan Kim, Yisoo Na, Donghun Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Pulse-level protocols are commonly used in quantum information and sensing experiments. However, finite pulse width, inevitable in many cases due to experimental conditions, can affect the overall performance of the quantum measurement. Here, we study the effect of finite pulse width on quantum sensing experiments based on the solid-state spin qubits: nitrogen-vacancy centers in diamond. We perform magnetic sensing experiments of DC and AC fields using canonical sensing protocols: Ramsey interferometry, Hahn echo, and XY8 dynamical decoupling. By varying the width of π/2 and π pulse used in the protocols, we estimate the amount of phase accumulation during the pulses and correct their effects by compensating the qubit evolution time for time offsets due to the phase accumulation. In this way, we are able to recover optimal conditions for maximum sensitivity.

Original languageEnglish
Pages (from-to)140-144
Number of pages5
JournalCurrent Applied Physics
Volume50
DOIs
Publication statusPublished - 2023 Jun

Bibliographical note

Funding Information:
This work is supported by the National Research Foundation of Korea ( 2018M3C7A1024602 , 2022M3K4A1094777 ).

Publisher Copyright:
© 2023 Korean Physical Society

Keywords

  • Diamond Nitrogen Vacancy center
  • Finite pulse width
  • Sensitivity
  • Spin qubits

ASJC Scopus subject areas

  • General Materials Science
  • General Physics and Astronomy

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