Coherent manipulation of nuclear spins in the strong driving regime
Spin-based quantum information processing makes extensive use of spin-state manipulation. This ranges from dynamical decoupling of nuclear spins in quantum sensing experiments to applying logical gates on qubits in a quantum processor. Fast manipulation of spin states is highly desirable for acceler...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ad0c0b |
| _version_ | 1797404113512693760 |
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| author | Dan Yudilevich Alon Salhov Ido Schaefer Konstantin Herb Alex Retzker Amit Finkler |
| author_facet | Dan Yudilevich Alon Salhov Ido Schaefer Konstantin Herb Alex Retzker Amit Finkler |
| author_sort | Dan Yudilevich |
| collection | DOAJ |
| description | Spin-based quantum information processing makes extensive use of spin-state manipulation. This ranges from dynamical decoupling of nuclear spins in quantum sensing experiments to applying logical gates on qubits in a quantum processor. Fast manipulation of spin states is highly desirable for accelerating experiments, enhancing sensitivity, and applying elaborate pulse sequences. Strong driving using intense radio-frequency (RF) fields can, therefore, facilitate fast manipulation and enable broadband excitation of spin species. In this work, we present an antenna for strong driving in quantum sensing experiments and theoretically address challenges of the strong driving regime. First, we designed and implemented a micron-scale planar spiral RF antenna capable of delivering intense fields to a sample. The planar antenna is tailored for quantum sensing experiments using the diamond’s nitrogen-vacancy (NV) center and should be applicable to other solid-state defects. The antenna has a broad bandwidth of 22 MHz, is compatible with scanning probes, and is suitable for cryogenic and ultrahigh vacuum conditions. We measure the magnetic field induced by the antenna and estimate a field-to-current ratio of $113 \pm 16$ G/A, representing a six-fold increase in efficiency compared to the state-of-the-art, crucial for cryogenic experiments. We demonstrate the antenna by driving Rabi oscillations in ^1 H spins of an organic sample on the diamond surface and measure ^1 H Rabi frequencies of over 500 kHz, i.e. $\mathrm{\pi}$ -pulses shorter than 1 $\mu\mathrm{s}$ —an order of magnitude faster than previously reported in NV-based nuclear magnetic resonance (NMR). Finally, we discuss the implications of driving spins with a field tilted from the transverse plane in a regime where the driving amplitude is comparable to the spin-state splitting, such that the rotating wave approximation does not describe the dynamics well. We present a simple recipe to optimize pulse fidelity in this regime based on a phase and offset-shifted sine drive, which may be optimized in situ without numerical optimization procedures or precise modeling of the experiment. We consider this approach in a range of driving amplitudes and show that it is particularly efficient in the case of a tilted driving field. The results presented here constitute a foundation for implementing fast nuclear spin control in various systems. |
| first_indexed | 2024-03-09T02:48:13Z |
| format | Article |
| id | doaj.art-6520371b25224b46810b7e6af0dd9c4f |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-09T02:48:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-6520371b25224b46810b7e6af0dd9c4f2023-12-05T13:57:21ZengIOP PublishingNew Journal of Physics1367-26302023-01-01251111304210.1088/1367-2630/ad0c0bCoherent manipulation of nuclear spins in the strong driving regimeDan Yudilevich0https://orcid.org/0000-0002-2236-648XAlon Salhov1https://orcid.org/0000-0001-9111-2400Ido Schaefer2https://orcid.org/0000-0003-2301-4432Konstantin Herb3Alex Retzker4https://orcid.org/0000-0002-7291-7120Amit Finkler5https://orcid.org/0000-0002-8034-4000Department of Chemical and Biological Physics, Weizmann Institute of Science , Rehovot 7610001, IsraelRacah Institute of Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, IsraelRacah Institute of Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel; Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, GermanyDepartment of Physics, ETH Zurich , Otto Stern Weg 1, Zurich, 8093, SwitzerlandRacah Institute of Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel; AWS Center for Quantum Computing , Pasadena, CA 91125, United States of AmericaDepartment of Chemical and Biological Physics, Weizmann Institute of Science , Rehovot 7610001, IsraelSpin-based quantum information processing makes extensive use of spin-state manipulation. This ranges from dynamical decoupling of nuclear spins in quantum sensing experiments to applying logical gates on qubits in a quantum processor. Fast manipulation of spin states is highly desirable for accelerating experiments, enhancing sensitivity, and applying elaborate pulse sequences. Strong driving using intense radio-frequency (RF) fields can, therefore, facilitate fast manipulation and enable broadband excitation of spin species. In this work, we present an antenna for strong driving in quantum sensing experiments and theoretically address challenges of the strong driving regime. First, we designed and implemented a micron-scale planar spiral RF antenna capable of delivering intense fields to a sample. The planar antenna is tailored for quantum sensing experiments using the diamond’s nitrogen-vacancy (NV) center and should be applicable to other solid-state defects. The antenna has a broad bandwidth of 22 MHz, is compatible with scanning probes, and is suitable for cryogenic and ultrahigh vacuum conditions. We measure the magnetic field induced by the antenna and estimate a field-to-current ratio of $113 \pm 16$ G/A, representing a six-fold increase in efficiency compared to the state-of-the-art, crucial for cryogenic experiments. We demonstrate the antenna by driving Rabi oscillations in ^1 H spins of an organic sample on the diamond surface and measure ^1 H Rabi frequencies of over 500 kHz, i.e. $\mathrm{\pi}$ -pulses shorter than 1 $\mu\mathrm{s}$ —an order of magnitude faster than previously reported in NV-based nuclear magnetic resonance (NMR). Finally, we discuss the implications of driving spins with a field tilted from the transverse plane in a regime where the driving amplitude is comparable to the spin-state splitting, such that the rotating wave approximation does not describe the dynamics well. We present a simple recipe to optimize pulse fidelity in this regime based on a phase and offset-shifted sine drive, which may be optimized in situ without numerical optimization procedures or precise modeling of the experiment. We consider this approach in a range of driving amplitudes and show that it is particularly efficient in the case of a tilted driving field. The results presented here constitute a foundation for implementing fast nuclear spin control in various systems.https://doi.org/10.1088/1367-2630/ad0c0bstrong drivingnuclear spinsrotating wave approximationnitrogen vacancy center in diamondRabi oscillationsantenna |
| spellingShingle | Dan Yudilevich Alon Salhov Ido Schaefer Konstantin Herb Alex Retzker Amit Finkler Coherent manipulation of nuclear spins in the strong driving regime New Journal of Physics strong driving nuclear spins rotating wave approximation nitrogen vacancy center in diamond Rabi oscillations antenna |
| title | Coherent manipulation of nuclear spins in the strong driving regime |
| title_full | Coherent manipulation of nuclear spins in the strong driving regime |
| title_fullStr | Coherent manipulation of nuclear spins in the strong driving regime |
| title_full_unstemmed | Coherent manipulation of nuclear spins in the strong driving regime |
| title_short | Coherent manipulation of nuclear spins in the strong driving regime |
| title_sort | coherent manipulation of nuclear spins in the strong driving regime |
| topic | strong driving nuclear spins rotating wave approximation nitrogen vacancy center in diamond Rabi oscillations antenna |
| url | https://doi.org/10.1088/1367-2630/ad0c0b |
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