Control and cancellation of spin bath induced dephasing in solid-state ensembles

US11156674B2 · kind B2 · utility

Assignee

• President and Fellows of Harvard College · US

Inventors

• Connor Hart · Cambridge, US
• Erik Bauch · Cambridge, US
• Ronald L. Walsworth · Cambridge, US
• Matthew Turner · Troy, US
• Jennifer May Schloss · Cambridge, US
• John F. Barry · Cambridge, US

Key dates

• Filing date: Jun 6, 2018
• Grant date: Oct 26, 2021
• Expiry date: Sep 2, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/26
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and system of measuring a direct current magnetic field using a plurality of spin centers are disclosed. A spin bath associated with the spin centers may be driven with a first source of electromagnetic radiation to reduce dephasing of the spin centers. The spin centers may be measured using double quantum (DQ) magnetometry in order to reduce the effects of crystal strain on spin dephasing times. An electromagnetic response of at least one of the plurality of spin centers may be observed using an electromagnetic radiation collection device. Accordingly, up to an eight times improvement in DC field sensitivity may be accomplished for a spin center ensemble.