Objetivo "Bose-Einstein condensation, the macroscopic ground state occupation of a system of bosonic particles below a critical temperature, has in the last two decades been observed in cold atomic gases and in solid-state physics quasiparticles. The perhaps most widely known example of a bosonic gas, photons in blackbody radiation, however exhibits no Bose-Einstein condensation, because the particle number is not conserved and at low temperatures the photons disappear in the system’s walls instead of massively occupying the cavity ground mode. This is not the case in a small optical cavity, with a low-frequency cutoff imprinting a spectrum of photon energies restricted to well above the thermal energy. Using a microscopic cavity filled with dye solution at room temperature, my group has recently observed the first Bose-Einstein condensate of photons.Building upon this work, the grant applicant here proposes to study the physics of interacting photon Bose-Einstein condensates in variable potentials. We will study the flow of the light condensate around external perturbations, and exploit signatures for superfluidity of the two-dimensional photon gas. Moreover, the condensate will be loaded into variable potentials induced by optical index changes, forming a periodic array of nanocavities. We plan to investigate the Mott insulating regime, and study thermal equilibrium population of more complex entangled manybody states for the photon gas. Other than in an ultracold atomic gas system, loading and cooling can proceed throughout the lattice manipulation time in our system. We expect to be able to directly condense into a macroscopic occupation of highly entangled quantum states. This is an issue not achievable in present atomic physics Bose-Einstein condensation experiments. In the course of the project, quantum manybody states, when constituting the system ground state, will be macroscopically populated in a thermal equilibrium process." Ámbito científico natural sciencesphysical sciencesatomic physicsnatural sciencesphysical sciencescondensed matter physicssolid-state physicsnatural sciencesphysical sciencescondensed matter physicsbose-einstein condensatesnatural sciencesphysical sciencestheoretical physicsparticle physicsphotons Programa(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Tema(s) ERC-AG-PE2 - ERC Advanced Grant - Fundamental constituents of matter Convocatoria de propuestas ERC-2012-ADG_20120216 Consulte otros proyectos de esta convocatoria Régimen de financiación ERC-AG - ERC Advanced Grant Institución de acogida RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN Aportación de la UE € 2 133 560,00 Dirección REGINA PACIS WEG 3 53113 Bonn Alemania Ver en el mapa Región Nordrhein-Westfalen Köln Bonn, Kreisfreie Stadt Tipo de actividad Higher or Secondary Education Establishments Investigador principal Ernst Martin Weitz (Prof.) Contacto administrativo Daniela Hasenpusch (Ms.) Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Coste total Sin datos Beneficiarios (1) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN Alemania Aportación de la UE € 2 133 560,00 Dirección REGINA PACIS WEG 3 53113 Bonn Ver en el mapa Región Nordrhein-Westfalen Köln Bonn, Kreisfreie Stadt Tipo de actividad Higher or Secondary Education Establishments Investigador principal Ernst Martin Weitz (Prof.) Contacto administrativo Daniela Hasenpusch (Ms.) Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Coste total Sin datos