Laboratoire Collisions Agrégats Réactivité - UMR5589

2 juillet 2024: 1 événement

séminaire

• The nanofiber - cold atom platform : A tool for studying light-matter interaction and prospects for interfacing ultracold molecules

  Mardi 2 juillet 11:00-12:00 - Max Schemmer - Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (CNR-INO), Sesto Fiorentino, Italy

  The nanofiber - cold atom platform : A tool for studying light-matter interaction and prospects for interfacing ultracold molecules

  Résumé : The 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.
  These 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.
  References :
  [1] Masters, et al. "Photon Antibunching in Two-Level Quantum Emitters." Nat. Photonics, 2023.
  [2] Cordier*, Schemmer*, et al. "Quantum Interference in Two-Photon Scattering Processes." PRL, 2023.
  [3] Márquez-Mijares, et al. "Interfacing Ultracold Molecules with Nanofibers." Physica Scripta, 2023.
  [4] Finelli, et al. 2024, "Ultracold LiCr : A New Pathway to Quantum Gases of Paramagnetic Polar Molecules", PRX Quantum

  Lieu : Salle de conférence du bâtiment 3R4
  En savoir plus : The nanofiber - cold atom platform : A tool for studying light-matter interaction and prospects for interfacing ultracold molecules