Electrically controlled spin mechanical coupling in a carbon nanotube resonator

ORAL

Abstract

Coupling of a quantum system like a single spin to a mechanical resonator has many interesting applications in classical and quantum information processing, as well as sensing, long-distance spin-spin coupling, and investigating motion at the quantum limit.

We report on the first realization of spin mechanical coupling on a fully suspended carbon nanotube resonator.

Strong spin-orbit interaction allows both the coherent manipulation of a single electron spin and mediates the coupling between the spin and the nanotube motion. We observe both resonant and off-resonant coupling, as a shift and broadening of the electron dipole spin-resonance (EDSR)-frequency, respectively.

We develop a complete theoretical model that matches the experimental data and provides a detailed understanding of the complex mechanisms at play. Our results demonstrate the potential of hybrid semiconductor circuits for applications requiring both mechanical and electric degrees of freedom on chip.

*This research was supported by grant numbers FQXi-IAF19-01 and FQXi-IAF19-05 from the Foundational Questions Institute Fund, a donor-advised fund of Silicon Valley Community Foundation, the Royal Society, EPSRC Platform Grant (grant numbers EP/R029229/1 and EP/R045577/1), the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement number 948932), the Templeton World Charity Foundation, Inc (grant number TWCF0338) and the ANR Research Collaborative Project "Qu-DICE" (grant number ANR-PRC-CES47), the Spanish Government (Grant Contract, FIS-2017-83706- R) and the Vetenskapsr°adet, Swedish VR (project number 2018-05061).

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Presenters

  • Federico Fedele

    • Niels Bohr Institute, University of Copenhagen
    • University of Oxford
    • University Of Oxford

Authors

  • Federico Fedele

    • Niels Bohr Institute, University of Copenhagen
    • University of Oxford
    • University Of Oxford

  • Federico Cerisola

    • University of Oxford

  • Léa Bresque

    • Institut Néel
    • Universite Grenoble Alpes, CNRS, Grenoble INP, Institut Neel, 38000 Grenoble, France

  • Kushagra Aggarwal

    • University of Oxford

  • Jorge Tabanera

    • Departamento de Estructura de la Materia, Física Térmica y Electrónica and GISC, Universidad Complutense Madrid, 28040 Madrid, Spain

  • Juliette Monsel

    • Chalmers Univ of Tech
    • Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, S-412 96 Goteborg, Sweden

  • Alexia Auffèves

    • Institut Néel
    • Universite Grenoble Alpes, CNRS, Grenoble INP, Institut Neel, 38000 Grenoble, France

  • Juan M Rodríguez Parrondo

    • Departamento de Estructura de la Materia, Física Térmica y Electrónica and GISC, Universidad Complutense Madrid, 28040 Madrid, Spain

  • Janet Anders

    • Physics and Astronomy, University of Exeter, Exeter EX4 4QL, United Kingdom

  • András Pályi

    • Department of Theoretical Physics, Budapest University of Technology and Economics, Hungary
    • Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Muegyetem rkp. 3., H-1111 Budapest, Hungary

  • Natalia Ares

    • University of Oxford