INPEC

Interacting Photon Bose-Einstein Condensates in Variable Potentials

Coordinatore	RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	Germany [DE]
Totale costo	2˙133˙560 €
EC contributo	2˙133˙560 €
Programma	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)
Code Call	ERC-2012-ADG_20120216
Funding Scheme	ERC-AG
Anno di inizio	2013
Periodo (anno-mese-giorno)	2013-03-01   -   2018-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN  Organization address address: REGINA PACIS WEG 3 city: BONN postcode: 53113 contact info Titolo: Ms. Nome: Daniela Cognome: Hasenpusch Email: send email Telefono: +49 228 73 7274 Fax: +49 228 73 6479	DE (BONN)	hostInstitution	2˙133˙560.00
2	RHEINISCHE FRIEDRICH-WILHELMS-UNIVERSITAT BONN  Organization address address: REGINA PACIS WEG 3 city: BONN postcode: 53113 contact info Titolo: Prof. Nome: Ernst Martin Cognome: Weitz Email: send email Telefono: +49 228 73 4837 Fax: +49 228 73 3474	DE (BONN)	hostInstitution	2˙133˙560.00

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 Obiettivo del progetto (Objective)

'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.'