Repository logo
 

Coherence protection of spin qubits in hexagonal boron nitride.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Hekmati, Reza 
Patrickson, Charlie J  ORCID logo  https://orcid.org/0000-0003-0550-6396
Arvidsson-Shukur, David RM  ORCID logo  https://orcid.org/0000-0002-0185-0352

Abstract

Spin defects in foils of hexagonal boron nitride are an attractive platform for magnetic field imaging, since the probe can be placed in close proximity to the target. However, as a III-V material the electron spin coherence is limited by the nuclear spin environment, with spin echo coherence times of ∽100 ns at room temperature accessible magnetic fields. We use a strong continuous microwave drive with a modulation in order to stabilize a Rabi oscillation, extending the coherence time up to ∽ 4μs, which is close to the 10 μs electron spin lifetime in our sample. We then define a protected qubit basis, and show full control of the protected qubit. The coherence times of a superposition of the protected qubit can be as high as 0.8 μs. This work establishes that boron vacancies in hexagonal boron nitride can have electron spin coherence times that are competitive with typical nitrogen vacancy centres in small nanodiamonds under ambient conditions.

Description

Keywords

5108 Quantum Physics, 51 Physical Sciences, 5104 Condensed Matter Physics, Bioengineering

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

14

Publisher

Springer Science and Business Media LLC
Sponsorship
EPSRC (EP/T001062/1)