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DTSTART;TZID=Europe/Paris:20240702T110000
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DTSTAMP:20260419T000134
CREATED:20240629T070359Z
LAST-MODIFIED:20240701T072613Z
UID:10906-1719918000-1719923400@fermi.univ-tlse3.fr
SUMMARY:The nanofiber - cold atom platform: A tool for studying light-matter interaction and prospects for interfacing ultracold molecules. - (Max Schemmer / LCAR / Seminar). - 2/07/2024
DESCRIPTION:Max Schemmer Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (CNR-INO)\, Sesto Fiorentino\, Italy \nSeminar LCAR\, 2/07/2024\, 14H\, 3R4\, Salle de conférence du bâtiment 3R4 \nAbstract :\nThe interaction between light and two-level quantum emitters is a fundamental process in quantum optics. A defining feature of this process is antibunching\, i.e.\, two photons are never detected simultaneously when scattered by a single quantum emitter. This phenomenon is typically explained by the fact that a single two-level quantum emitter can only absorb and emit single photons. In this seminar\, I will present a complementary picture supported by two experimental studies [1\,2] that demonstrate that photon antibunching arises from quantum interference between two types of two-photon scattering processes\, namely coherent and incoherent scattering.\nThese results were obtained with laser-cooled atoms interfaced with a tapered optical fiber\, or nanofiber. Interestingly\, the nanofiber platform has been recently proposed to interface ultracold molecules [3]\, whose complexity opens up new possibilities in fundamental science. I will briefly introduce the challenges and opportunities of ultracold molecules referring to our work in Florence [4]. Finally\, I will discuss how I envision assembling ultracold molecules using nanofibers. \nReferences: \n\n[1] Masters\, et al. « Photon Antibunching in Two-Level Quantum Emitters. » Nat. Photonics\, 2023.\n[2] Cordier*\, Schemmer*\, et al. « Quantum Interference in Two-Photon Scattering Processes. » PRL\, 2023.\n[3] Márquez-Mijares\, et al. « Interfacing Ultracold Molecules with Nanofibers. » Physica Scripta\, 2023.\n[4] Finelli\, et al. 2024\, “Ultracold LiCr: A New Pathway to Quantum Gases of Paramagnetic Polar Molecules“\, PRX Quantum\n\n  \n\n \n \n 
URL:https://fermi.univ-tlse3.fr/event/the-nanofiber-cold-atom-platform-a-tool-for-studying-light-matter-interaction-and-prospects-for-interfacing-ultracold-molecules-max-schemmer-lcar-seminar-2-07-2024/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
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DTSTART;TZID=Europe/Paris:20240702T140000
DTEND;TZID=Europe/Paris:20240702T153000
DTSTAMP:20260419T000134
CREATED:20240630T060052Z
LAST-MODIFIED:20240701T072623Z
UID:10899-1719928800-1719934200@fermi.univ-tlse3.fr
SUMMARY:Échelle réglable de protection topologique dans un réseau triangulaire d’atomes de Rydberg. - (Pranay Patil / LPT / Seminar). - 2/07/2024\, 14H
DESCRIPTION:Pranay Patil (OIST\, Japon) \nSeminar LPT\, 2/07/2024\, 14H\, 3R1\, seminar room\, 3rd floor \nAbstract :\nRydberg atom arrays have recently been conjectured to host Z2 quantum spin liquids in certain parameter regimes. Due to the strong interactions between these atoms\, it is not possible to analytically study these systems\, and one must resort to Monte Carlo sampling of the path integral to reach definite conclusions. We use an update to sample the configuration space which is specifically designed to target the low energy excitation of the expected QSL. This allows us to reliably simulate Rydberg atoms on a triangular lattice in this regime and identify a correlated paramagnetic phase at low temperatures which hosts topological protection similar to a Z2 spin liquid up to a length scale tuned by Hamiltonian parameters. This result indicates the feasibility of Rydberg atom arrays to act as topological qubits. \n 
URL:https://fermi.univ-tlse3.fr/event/echelle-reglable-de-protection-topologique-dans-un-reseau-triangulaire-datomes-de-rydberg-pranay-patil-lpt-seminar-2-07-2024-14h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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