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    Echo Trains in Pulsed Electron Spin Resonance of a Strongly Coupled Spin Ensemble

    Stefan Weichselbaumer1,2, Matthias Zens3,4, Christoph W. Zollitsch1,2,*, Martin S. Brandt5,2,6, Stefan Rotter3, Rudolf Gross1,2,6, and Hans Huebl1,2,6,†

    • 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
    • 2Physik-Department, Technische Universität München, 85748 Garching, Germany
    • 3Institute for Theoretical Physics, TU Wien, Wiedner Hauptstraße 8-10/136, 1040 Vienna, Austria
    • 4ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
    • 5Walter Schottky Institut, Technische Universität München, 85748 Garching, Germany
    • 6Munich Center for Quantum Science and Technology (MCQST), Schellingstraße 4, 80799 München, Germany

    • *Present address: London Centre for Nanotechnology, University College London, London WC1H 0AH, United Kingdom.
    • †hans.huebl@wmi.badw.de
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    Phys. Rev. Lett. 125, 137701 – Published 22 September, 2020

    DOI: https://doi.org/10.1103/PhysRevLett.125.137701

    Abstract

    We report on a novel dynamical phenomenon in electron spin resonance experiments of phosphorus donors. When strongly coupling the paramagnetic ensemble to a superconducting lumped element resonator, the coherent exchange between these two subsystems leads to a train of periodic, self-stimulated echoes after a conventional Hahn echo pulse sequence. The presence of these multiecho signatures is explained using a simple model based on spins rotating on the Bloch sphere, backed up by numerical calculations using the inhomogeneous Tavis-Cummings Hamiltonian.

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    See Also

    Self-Stimulated Pulse Echo Trains from Inhomogeneously Broadened Spin Ensembles

    Kamanasish Debnath, Gavin Dold, John J. L. Morton, and Klaus Mølmer
    Phys. Rev. Lett. 125, 137702 (2020)

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    Phys. Rev. Lett. 125, 137701– Published 22 September, 2020
    • Received 26 September 2018
    • Revised 15 July 2020
    • Accepted 5 August 2020
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