Enhancing spin-spin coherence times in a Cr<sub>7</sub>Mn molecular nanomagnet at a clock transition

ORAL

Abstract

The development of quantum computing based on the spin quibits is contingent on the synthesis of spin quibits with long spin coherence time. Molecular nanomagnets (MNMs) are unique systems that allow chemical engineering of physical parameters in order to enhance their spin relaxation times. Atomic-clock transitions afford a method to significantly increase the spin-spin relaxation times (T2) for MNMs [1]. In dilute samples of Cr7Mn MNM with effective spin S=1, we have measured T2 values as high as 3 µs near a clock transition. We find that the effects of the clock transition are more pronounced with increased dilution and reduced temperature. We present the results of detailed studies of these effects and suggest ways to increase the coherence times further.
Reference:
[1] M. Shiddiq et al., Nature 531, 348 (2016).

*This work is supported by U. S. National Science Foundation under Grant Nos. DMR-1310135 and DMR-1708692.

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Presenters

  • Gajadhar Joshi

    • Physics and Astronomy, Amherst College

Authors

  • Gajadhar Joshi

    • Physics and Astronomy, Amherst College

  • Kai-Isaak Ellers

    • Physics and Astronomy, Amherst College

  • Charles Collett

    • Department of Physics and Astronomy, Amherst College, Amherst, MA, USA
    • Department of Physics and Astronomy, Amherst College, Amherst, MA 01002, USA
    • Physics and Astronomy, Amherst College

  • Daniel Sava

    • School of Chemistry, The University of Manchester, Manchester UK
    • Department of Chemistry, The University of Manchester
    • Chemistry, University of Manchester

  • Richard Winpenny

    • University of Manchester
    • School of Chemistry, The University of Manchester
    • School of Chemistry, The University of Manchester, Manchester UK
    • Department of Chemistry, The University of Manchester
    • Chemistry, University of Manchester

  • Grigore Timco

    • School of Chemistry, The University of Manchester
    • School of Chemistry, The University of Manchester, Manchester UK
    • Department of Chemistry, The University of Manchester
    • Chemistry, University of Manchester

  • Jonathan Friedman

    • Department of Physics and Astronomy, Amherst College
    • Department of Physics and Astronomy, Amherst College, Amherst, MA, USA
    • Department of Physics and Astronomy, Amherst College, Amherst, MA 01002, USA
    • Physics and Astronomy, Amherst College