Suppression of spin-bath dynamics for improved coherence of multi-spin-qubit systems

N. Bar-Gill*, L. M. Pham, C. Belthangady, D. Le Sage, P. Cappellaro, J. R. Maze, M. D. Lukin, A. Yacoby, R. Walsworth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

176 Scopus citations

Abstract

Multi-qubit systems are crucial for the advancement and application of quantum science. Such systems require maintaining long coherence times while increasing the number of qubits available for coherent manipulation. For solid-state spin systems, qubit coherence is closely related to fundamental questions of many-body spin dynamics. Here we apply a coherent spectroscopic technique to characterize the dynamics of the composite solid-state spin environment of nitrogen-vacancy colour centres in room temperature diamond. We identify a possible new mechanism in diamond for suppression of electronic spin-bath dynamics in the presence of a nuclear spin bath of sufficient concentration. This suppression enhances the efficacy of dynamical decoupling techniques, resulting in increased coherence times for multi-spin-qubit systems, thus paving the way for applications in quantum information, sensing and metrology.

Original languageAmerican English
Article number858
JournalNature Communications
Volume3
DOIs
StatePublished - 2012
Externally publishedYes

Bibliographical note

Funding Information:
We gratefully acknowledge fruitful discussions with Patrick Maletinsky and Shimon Kolkowitz; and assistance with samples by Daniel Twitchen and Matthew Markham (Element 6) and Patrick Doering and Robert Linares (Apollo). This work was supported by NIST, NSF, US Army Research Office and DARPA (QuEST and QuASAR programs). PC was partially funded by NSF under grant no. DMG-1005926.

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