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Experimental demonstration of three-photon Coherent Population Trapping in an ion cloud

Abstract : A novel protocol of interrogation based on coherent population trapping in an N-level scheme atomic system leads to dark resonances involving three different photons. An ensemble of several hundreds of radio-frequency trapped Ca+ ions is probed by three lasers simultaneously locked onto the same optical frequency comb, resulting in high-contrast spectral lines referenced to an atomic transition in the THz domain. We discuss the cause of uncertainties and limitations for this method and show that reaching a sub-kHz resolution is experimentally accessible via this interrogation protocol.
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https://hal.archives-ouvertes.fr/hal-02064988
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Submitted on : Wednesday, June 19, 2019 - 4:53:02 PM
Last modification on : Wednesday, November 3, 2021 - 5:53:59 AM

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Mathieu Collombon, Cyril Chatou, Gaétan Hagel, Jofre Pedregosa-Gutierrez, Marie Houssin, et al.. Experimental demonstration of three-photon Coherent Population Trapping in an ion cloud. Physical Review Applied, American Physical Society, 2019, 12, pp.034035. ⟨10.1103/PhysRevApplied.12.034035⟩. ⟨hal-02064988v2⟩

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