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Ultra-long coherence times amongst room-temperature solid-state spins

Author

Listed:
  • E. D. Herbschleb

    (Kyoto University)

  • H. Kato

    (National Institute of Advanced Industrial Science and Technology (AIST))

  • Y. Maruyama

    (Kyoto University)

  • T. Danjo

    (Kyoto University)

  • T. Makino

    (National Institute of Advanced Industrial Science and Technology (AIST))

  • S. Yamasaki

    (National Institute of Advanced Industrial Science and Technology (AIST))

  • I. Ohki

    (Kyoto University)

  • K. Hayashi

    (Kyoto University)

  • H. Morishita

    (Kyoto University)

  • M. Fujiwara

    (Kyoto University)

  • N. Mizuochi

    (Kyoto University)

Abstract

Solid-state single spins are promising resources for quantum sensing, quantum-information processing and quantum networks, because they are compatible with scalable quantum-device engineering. However, the extension of their coherence times proves challenging. Although enrichment of the spin-zero 12C and 28Si isotopes drastically reduces spin-bath decoherence in diamond and silicon, the solid-state environment provides deleterious interactions between the electron spin and the remaining spins of its surrounding. Here we demonstrate, contrary to widespread belief, that an impurity-doped (phosphorus) n-type single-crystal diamond realises remarkably long spin-coherence times. Single electron spins show the longest inhomogeneous spin-dephasing time ( $$T_2^ \ast \approx 1.5$$ T 2 * ≈ 1.5 ms) and Hahn-echo spin-coherence time (T2 ≈ 2.4 ms) ever observed in room-temperature solid-state systems, leading to the best sensitivities. The extension of coherence times in diamond semiconductor may allow for new applications in quantum technology.

Suggested Citation

  • E. D. Herbschleb & H. Kato & Y. Maruyama & T. Danjo & T. Makino & S. Yamasaki & I. Ohki & K. Hayashi & H. Morishita & M. Fujiwara & N. Mizuochi, 2019. "Ultra-long coherence times amongst room-temperature solid-state spins," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11776-8
    DOI: 10.1038/s41467-019-11776-8
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