This topic brings together teams that study phenomena related to fundamental concepts of quantum mechanics, such as entanglement, decoherence, non-classical states, quantum memories, Casimir physics and quantum limits in measurements.
The “Quantum Optics and Quantum Information” research topic brings together 4 research groups dealing with different aspects of the foundations of quantum theory and quantum fluctuations. Among the numerous research subjects, one should mention Quantum Non Demolition measurements, entanglement and decoherence, the generation of non-classical states, quantum limits in high-sensitivity measurements, quantum memories and other quantum information devices, the Casimir force or the link between quantum fluctuations and relativity. These research are performed with a number of experimental systems: Rydberg atoms coupled to microwave fields, cold atoms, atom chips, microcavities, optical parametric oscillators, and micro- and nanomechanical resonators coupled either to quantum vacuum or to intense laser fields.
The “Cavity QED” group performs QND measurements by coupling Rydberg atoms to a microwave cavity. Such a coupling enables to experimentally generate “Schrödinger cats”, to study their decoherence and to demonstrate building blocks for quantum information processing systems.
The “Quantum Optics “ group works on the quantum properties of light that is produced by many different optical systems. It consists of experimental and theoretical studies concerning quantum fluctuations of light, generation of entangled states, interaction between quantum light and matter, nanophotonics, and quantum metrology.
The “Optomechanics and Quantum Measurements” group deals with quantum effects of radiation pressure and entanglement between light and micro- or nanomechanical resonators. Beyond the understanding of quantum limits in optical measurements, these research also have applications in high-sensitivity measurements such as gravitational-wave detection or to cool a macroscopic mechanical resonator down to its quantum ground state.
The “Quantum Fluctuations and Relativity” group focusses on the effects of quantum fluctuations, especially on the Casimir effect and dispersion forces, quantum reflection, and the link between quantum theory and gravitation.
Permanent staff : Michel Brune, Igor Dotsenko, Sébastien Gleyzes, Serge Haroche, Jean-Michel Raimond, Clément Sayrin
Permanent staff : Alberto Bramati, Claude Fabre, Elisabeth Giacobino, Quentin Glorieux, Julien Laurat, Valentina Parigi, Nicolas Treps
Optomechanics and Quantum Measurements
Permanent staff : Tristan Briant, Pierre-François Cohadon, Samuel Deléglise, Antoine Heidmann, Thibaut Jacqmin
Quantum Fluctuations and Relativity
Permanent staff : Jean-Michel Courty, Romain Guérout, Astrid Lambrecht, Serge Reynaud