774 research outputs found

    Circularly polarized microwaves for magnetic resonance study in the GHz range: application to nitrogen-vacancy in diamonds

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    The ability to create time-dependent magnetic fields of controlled polarization is essential for many experiments with magnetic resonance. We describe a microstrip circuit that allows us to generate strong magnetic field at microwave frequencies with arbitrary adjusted polarization. The circuit performance is demonstrated by applying it to an optically detected magnetic resonance and Rabi nutation experiments in nitrogen-vacancy color centers in diamond. Thanks to high efficiency of the proposed microstrip circuit and degree of circular polarization of 85% it is possible to address the specific spin states of a diamond sample using a low power microwave generator.Comment: 4 pages, 7 figures, nitrogen-vacancy, microwave circular polarization, spin-state addressin

    The Certification of the Contents (Mass Fractions) of Flumequine and Oxolinic Acid in Freeze-dried Salmon Tissue. BCR 725

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    Abstract not availableJRC.D-Institute for Reference Materials and Measurements (Geel

    Certification of a Refillable PET Bottle Material with Respect to Chemical Inertness Behaviour According to a PR-CEN Standard Method, BCR-712.

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    Abstract not availableJRC.D-Institute for Reference Materials and Measurements (Geel

    The Certification of the Mass Concentrations of Aluminium, Selenium and Zinc in Human Serum, BCR-637, BCR-638, BCR-639.

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    Abstract not availableJRC.D-Institute for Reference Materials and Measurements (Geel

    The Certification of the Mass Concentrations of Lead and Cadmium in Reconstituted Human Blood. BCR-634, BCR-635, BCR-636.

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    Abstract not availableJRC.D-Institute for Reference Materials and Measurements (Geel

    The Certification of Reference Plasmas for the prothrombin Time, BCR-628 (Abnormal Plasma 2), BCR-630 (Abnormal Plasma 1)

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    Abstract not availableJRC.D - Institute for Reference Materials and Measurements (Geel

    Competitive stochastic noises in coherently driven two-level atoms and quantum interference

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    A system of coherently-driven two-level atoms is analyzed in presence of two independent stochastic perturbations: one due to collisions and a second one due to phase fluctuations of the driving field. The behaviour of the quantum interference induced by the collisional noise is considered in detail. The quantum-trajectory method is utilized to reveal the phase correlations between the dressed states involved in the interfering transition channels. It is shown that the quantum interference induced by the collisional noise is remarkably robust against phase noise. This effect is due to the fact that the phase noise, similarly to collisions, stabilizes the phase-difference between the dressed states.Comment: accepted for publication in J. Opt.
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