Laboratoire Collisions Agrégats Réactivité - UMR5589

4 décembre 2025: 1 événement

séminaire

• Rydberg atoms as quantum sensors : RF sensing and Rydberg-atom interferometry for antimatter gravity measurements

  Jeudi 4 décembre 11:00-12:00 - Louise McCaul - University College London

  Rydberg atoms as quantum sensors : RF sensing and Rydberg-atom interferometry for antimatter gravity measurements

  Résumé : Atoms in highly excited Rydberg states can have large induced electric dipole moments and therefore extreme sensitivity to electric fields. In this talk I will present two examples of exploting this property for sensing applications. The first involves Schrödinger cat states of a Rydberg electron and leverages these superpositions of states with oppositely orientated static electric dipole moments as a matched radio frequency ( 5 MHz) receiver. I will describe the preparation of these states and the implementation and sensitivity of such a matched field sensor. The second is the development of a method to perform Rydberg-atom interferometry with positronium to enable a test of antimatter gravity and a weak equivalence test for leptons, in an electric analogue of Stern-Gerlach interferometry. I will discuss the concept of the measurement and the expected sensitivity and challenges.

  Lieu : Salle de conférence 3R4
  En savoir plus : Rydberg atoms as quantum sensors : RF sensing and Rydberg-atom interferometry for antimatter gravity measurements