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Title: Controlling the coherence of a diamond spin qubit through its strain environment

Abstract

The uncontrolled interaction of a quantum system with its environment is detrimental for quantum coherence. For quantum bits in the solid state, decoherence from thermal vibrations of the surrounding lattice can typically only be suppressed by lowering the temperature of operation. Here, we use a nano-electro-mechanical system to mitigate the effect of thermal phonons on a spin qubit – the silicon-vacancy colour centre in diamond – without changing the system temperature. By controlling the strain environment of the colour centre, we tune its electronic levels to probe, control, and eventually suppress the interaction of its spin with the thermal bath. Strain control provides both large tunability of the optical transitions and significantly improved spin coherence. Finally, our findings indicate the possibility to achieve strong coupling between the silicon-vacancy spin and single phonons, which can lead to the realisation of phonon-mediated quantum gates and nonlinear quantum phononics.

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [3];  [2];  [2];  [2];  [1];  [1];  [1];  [4];  [4];  [4];  [1];  [2];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
  2. Univ. of Cambridge (United Kingdom). Cavendish Lab.
  3. Harvard Univ., Cambridge, MA (United States); Univ. of Cambridge (United Kingdom). Cavendish Lab.
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1469655
Report Number(s):
SAND2017-5085J
Journal ID: ISSN 2041-1723; PII: 4340
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Sohn, Young-Ik, Meesala, Srujan, Pingault, Benjamin, Atikian, Haig A., Holzgrafe, Jeffrey, Gündoğan, Mustafa, Stavrakas, Camille, Stanley, Megan J., Sipahigil, Alp, Choi, Joonhee, Zhang, Mian, Pacheco, Jose L., Abraham, John, Bielejec, Edward, Lukin, Mikhail D., Atatüre, Mete, and Lončar, Marko. Controlling the coherence of a diamond spin qubit through its strain environment. United States: N. p., 2018. Web. doi:10.1038/s41467-018-04340-3.
Sohn, Young-Ik, Meesala, Srujan, Pingault, Benjamin, Atikian, Haig A., Holzgrafe, Jeffrey, Gündoğan, Mustafa, Stavrakas, Camille, Stanley, Megan J., Sipahigil, Alp, Choi, Joonhee, Zhang, Mian, Pacheco, Jose L., Abraham, John, Bielejec, Edward, Lukin, Mikhail D., Atatüre, Mete, & Lončar, Marko. Controlling the coherence of a diamond spin qubit through its strain environment. United States. doi:10.1038/s41467-018-04340-3.
Sohn, Young-Ik, Meesala, Srujan, Pingault, Benjamin, Atikian, Haig A., Holzgrafe, Jeffrey, Gündoğan, Mustafa, Stavrakas, Camille, Stanley, Megan J., Sipahigil, Alp, Choi, Joonhee, Zhang, Mian, Pacheco, Jose L., Abraham, John, Bielejec, Edward, Lukin, Mikhail D., Atatüre, Mete, and Lončar, Marko. Tue . "Controlling the coherence of a diamond spin qubit through its strain environment". United States. doi:10.1038/s41467-018-04340-3. https://www.osti.gov/servlets/purl/1469655.
@article{osti_1469655,
title = {Controlling the coherence of a diamond spin qubit through its strain environment},
author = {Sohn, Young-Ik and Meesala, Srujan and Pingault, Benjamin and Atikian, Haig A. and Holzgrafe, Jeffrey and Gündoğan, Mustafa and Stavrakas, Camille and Stanley, Megan J. and Sipahigil, Alp and Choi, Joonhee and Zhang, Mian and Pacheco, Jose L. and Abraham, John and Bielejec, Edward and Lukin, Mikhail D. and Atatüre, Mete and Lončar, Marko},
abstractNote = {The uncontrolled interaction of a quantum system with its environment is detrimental for quantum coherence. For quantum bits in the solid state, decoherence from thermal vibrations of the surrounding lattice can typically only be suppressed by lowering the temperature of operation. Here, we use a nano-electro-mechanical system to mitigate the effect of thermal phonons on a spin qubit – the silicon-vacancy colour centre in diamond – without changing the system temperature. By controlling the strain environment of the colour centre, we tune its electronic levels to probe, control, and eventually suppress the interaction of its spin with the thermal bath. Strain control provides both large tunability of the optical transitions and significantly improved spin coherence. Finally, our findings indicate the possibility to achieve strong coupling between the silicon-vacancy spin and single phonons, which can lead to the realisation of phonon-mediated quantum gates and nonlinear quantum phononics.},
doi = {10.1038/s41467-018-04340-3},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {5}
}

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    Works referencing / citing this record:

    Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum-dot superradiance
    journal, July 2019


    Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum-dot superradiance
    journal, July 2019


    Spectral Alignment of Single-Photon Emitters in Diamond using Strain Gradient
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    Optical coherence of implanted silicon vacancy centers in thin diamond membranes
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