Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series SEM-PHYS-ENS
Subjects quant-ph
Date Tuesday 3 October 2017
Time 17:15
Institute DPT-PHYS-ENS
Seminar Room Salle Dussane, 45 rue d'Ulm, ENS Paris
Speaker's Last Name Brune
Speaker's First Name Michel
Speaker's Email Address
Speaker's Institution Laboratoire Kastler Brossel
Title Prix des Trois Physiciens: From quantum measurement to quantum simulations with Rydberg atoms
Abstract Award ceremony and special seminar by the 2017 recipient of the "Prix des Trois Physiciens". Rydberg atoms have many exaggerated properties with respect to ordinary atomic levels with lower energy. Their large orbital corresponds to huge dipoles, strongly coupled to microwave fields. We used this feature for probing a field made of a few microwave photons trapped in a high Q superconducting cavity. We will present experiments achieving non-destructive photons counting, and exhibiting some of the most intriguing feature of quantum measurements : state projection, quantum jumps and decoherence of Schrödinger kitten states. The unprecedented polarizability of Rydberg atoms makes then exhibit unusually strong dipole-dipole interaction. Spontaneous emission of circular Rydberg atoms can also be strongly suppressed by using metallic structures controlling the radiation field mode density. We propose the construction of a quantum simulator of XXZ spin chain or ladder Hamiltonian by using linear chains of trapped circular Rydberg atoms. We will discuss open condensed matter problems, which may be addressed with this simulator.
arXiv Preprint Number

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