报告题目：Recent experiments in the Quantum Optics Group - ENS, Paris
报告人：Quentin Glorieux 副教授
主持人：武愕 教授
时间：2017-12-14 10:00
地点：理科大楼A814
报告人简介：
After his engineering degree at Institut d’Optique and his Master degree at Ecole Polytechnique, Quentin Glorieux went to graduate school at the Paris Diderot University. In 2010, he earned a PhD in Quantum Optics at the laboratory Matériaux et Phénomènes Quantiques under the supervision of Pr Thomas Coudreau. During his PhD, he demonstrated the generation of multispatial mode entangled states using four-wave mixing in hot atomic vapors. In 2010, he joined Paul Lett’s group at NIST in Gaithersburg as a postdoctoral fellow in the Laser Cooling group directed by William Phillips.
Quentin Glorieux was awarded a Marie Curie European IOF fellowship in 2011 to initiate a project on Multimode Quantum Memories with the NIST, the Australian National University and the group of Nicolas Gisin at University of Geneva. In September 2013, Quentin Glorieux has started a position of Associate Professor at University Pierre and Marie Curie (UPMC) in Paris as a member of the Laboratoire Kastler Brossel (LKB).
In 2014, Quentin Glorieux received the City of Paris Young Scientist “Emergences” Award which provides fundings to start an independent research group. Since then, he conducts two experimental activities on :
·Nanophotonics : studying the coupling of single-photon emitters to nanostructures such as nanofiber
·Quantum fluid of light : investigating superfluidity of light propagating in atomic media
He is co-author of 24 publications in international peer reviewed journals (h=10, 310 citations) and 5 publications in international peer reviewed conference proceedings.
Recent experiments in the Quantum Optics Group - ENS, Paris. www.quantumoptics.fr
报告内容简介：
I will present two experiments performed recently in the Quantum Optics group at LKB
First, I will ask the question : can a linear dipole emit circularly polarized light ?
By coupling of single nano-scaled light sources to a tapered optical nanofiber, we show how the polarization of the emitted light can be strongly modified by the vicinity of the fiber. By comparing polarization measurements to electron microscope images we found a configuration for which a linear dipole starts to radiate circularly polarized light.
In a second part, I will present recent experiments to study quantum fluids of light. As an alternative approach to the confined light in cavities, we use a monochromatic light field propagating in a non-linear χ(3) medium (a near-resonant rubidium vapor) showing an intensity dependent refractive index.
Under the paraxial approximation, the transverse amplitude of the field can be described using a striking analogy with the formalism of the Gross-Pitaevskii equation (GPE) for the macroscopic wave-function of a Bose-Einstein condensate.
This system therefore allow to study the time evolution of a 2D Bose gas and potentially realized quantum simulation with light.