Experimental protection of quantum coherence by using a phase-tunable image drive

ORAL

Abstract

The protection of spin coherence is an essential task in order to manipulate, store and read quantum information. It has been proposed to dynamically decouple (DD) qubits from their surroundings by applying a series of distinct pulses1. For nitrogen vacancy centers, such protection was achieved by using concatenated DD up to the second order of dressing2. We go beyond their specific case and demonstrate T2~T1 with a new pulse protocol, independent of qubit initial state, in a number of materials with different spin Hamiltonians and environments3. The protocol uses two coherent microwave pulses: one drives the Rabi precession while a low-power, circularly polarized (image) pulse continuously sustains the spin motion. The initial phase of the image drive allows tuning the spin dynamics by altering the Floquet modes. The technical implementation is simple and can be generalized to any type of qubit, such as superconducting circuits or spin systems.
1. L. Viola, S. Lloyd, PRA 58, 2733 (1998).
2. D. Farfurnik, et al, PRA 96, 013850 (2017).
3. S. Bertaina et al, arXiv:2001.02417, to appear.

*Work supported by the CNRS infrastructure RENARD (award IR-RPE CNRS 3443). Partial support by the NSF Cooperative Agreement No. DMR-1644779 and the State of Florida is acknowledged.

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Presenters

  • Irinel Chiorescu

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University
    • Dept of Physics and The National High Magnetic Field Laboratory, Florida State Univ

Authors

  • Bertaina Sylvain

    • Inst. Mat. Microelectronique et Nanosciences de Provence, Aix-Marseille Universite, Marseille, France
    • Inst Mat Microelectronique et Nanosciences de Provence, UMR7334, CNRS, Aix- Marseille Universite, Marseille, France
    • IM2NP, Faculté des Sciences et Techniques, Marseille, France

  • Hervé Vezin

    • Université de Lille, CNRS, LASIR UMR 8516, 59665 Villeneuve d'Ascq, France
    • Universite de Lille, CNRS, LASIR UMR 8516, F-59655 Villeneuve d’Ascq, France
    • Laboratoire de Spectrochimie Infrarouge et Raman, UMR8516, CNRS, Universite de Lille, Villeneuve d'Ascq, France

  • Hans de Raedt

    • Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands

  • Irinel Chiorescu

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University
    • Dept of Physics and The National High Magnetic Field Laboratory, Florida State Univ