Related Experiment Video
Updated: Aug 8, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Quantum degeneracy of microcavity polaritons
A Baas1, J-Ph Karr, M Romanelli
1Laboratoire Kastler Brossel, Université Paris 6, Ecole Normale Supérieure et CNRS, UPMC Case 74, France. augustin.baas@epfl.ch
Abstract:
We investigate experimentally one of the main features of a quantum fluid constituted by exciton polaritons in a semiconductor microcavity, that is, quantum degeneracy of a macroscopic fraction of the particles. We show that resonant pumping allows us to create a macroscopic population of polaritons in one quantum state. Furthermore, we demonstrate that parametric polariton scattering results in the transfer of a macroscopic population of polariton from one single quantum state into another one. Finally, we briefly outline a simple method which provides direct evidence of the first-order spatial coherence of the transferred population.
Related Concept Videos
Dielectric Polarization in a Capacitor
Potential Due to a Polarized Object
The de Broglie Wavelength
Standing Waves in a Cavity
Induced Electric Dipoles
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Debye–Huckel–Onsager Conductance Equation

