@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    dct:description """
              In this thesis we present novel techniques for the study of ultracold gases of lithium atoms. In the first part of this thesis, we present the development of a narrow-linewidth laser source emitting 840mW of output power in the vicinity of the lithium D-line resonances at 671 nm. The source is based on a diode-end-pumped unidirectional ring laser operating on the 1342-nm transition in Nd:YVO4, capable of producing 1.3W of single-mode light delivered in a diffraction-limited beam. The output beam is subsequently frequency-doubled using periodically-poled potassium titanyl phosphate (ppKTP) in an external buildup cavity. We obtain doubling efficiencies of up to 86%. Tunability of the output frequency over more than 400GHz and frequency-locking of the cavity ensemble with respect to the lithium D-line transitions are accomplished. We measure the linewidth to be 200+400-200kHz. In the second part of this thesis, we employ the source in an experimental setup to produce to cool and trap lithium atoms. We realize samples of finite-temperature unitary Bose gases around the center of a Fano-Feshbach resonance, where interactions between the atoms are maximized. We present temperature-dependent measurements of the unitarity-limited three-body loss rate. The measured losses attain the limiting value imposed by quantum mechanics without adjustable parameters. This measurement allows for the introduction of a criterion for quasi-equilibrium. In this regime, by using technique based on in-situ imaging developed in our group, we provide a first measurement of the equation of state of the unitary Bose gas at low fugacities.
            """ ;
    dct:identifier "tel-00702865" ;
    dct:issued "2026-05-16T12:22:13.258208"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-16T12:22:13.258214"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "A novel all-solid-state laser source for lithium atoms and three-body recombination in the unitary Bose gas" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
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    dcat:keyword "diode-pumped-solid-state-lasers",
        "doublage-de-frequence",
        "frequency-doubling",
        "gaz-de-bose-unitaire",
        "infoeu-reposemanticsdoctoralthesis",
        "laser-cooling-of-atoms",
        "lasers-a-etat-solide-pompes-par-diode",
        "pertes-a-trois-corps",
        "physcondgasphysics-physicscondensed-matter-cond-matquantum-gases-cond-matquant-gas",
        "physphysphys-atom-phphysics-physicsphysics-physicsatomic-physics-physicsatom-ph",
        "physphysphys-opticsphysics-physicsphysics-physicsoptics-physicsoptics",
        "refroidissement-datomes-par-laser",
        "thermodynamics",
        "thermodynamique",
        "theses",
        "three-body-loss",
        "unitary-bose-gas" ;
    dcat:landingPage <https://theses.hal.science/tel-00702865> .

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    dct:issued "2026-05-16T12:22:13.313350"^^xsd:dateTime ;
    dct:modified "2026-05-16T12:22:13.216882"^^xsd:dateTime ;
    dct:title "A novel all-solid-state laser source for lithium atoms and three-body recombination in the unitary Bose gas" ;
    dcat:accessURL <https://theses.hal.science/tel-00702865> .

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