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Friday, November 9th, 2012  

From 11:00:00 AM
to 01:30:00 PM

Aula Magna, Physics and Astrophysics Dept., University of Florence (Sesto Fiorentino)

Published on-line at 03:42:21 PM on Tuesday, November 6th, 2012

Localization in Quantum Mechanics: from atom to photons

Foundations of quantum mechanics and experiments: localization phenomena, decoherence, statistical mechanics, entanglement, collective interactions.

Introductory remarks by Prof. Luca Lusanna.

Prof. Guido Bacciagaluppi will talk about "Decoherence, time (a)symmetry and statistical mechanics": recent literature suggests a tight link between the theory of decoherence and the foundations of statistical mechanics, while leaving open the explanation of the arrow of time in decoherence phenomena (why systems appear to get more entangled with their environments, rather than less entangled). This talk explores (rather speculatively) the consequences for this debate of looking at decoherence in the equilibrium regime itself.

Prof. Jakob Reichel's seminar will be on "Collective interaction in cavity quantum electrodynamics: Bose-Einstein condensates and quantum well polaritons": experiments in cavity quantum electrodynamics (CQED) shed light on the fundamental quantum physics of light-matter interactions. CQED is also an important paradigm in quantum information research, where it has enabled some of the most successful quantum interface and quantum memory experiments realized so far. The emitters in an optical CQED system can be very different physical systems, ranging from single neutral atoms to excitons in semiconductors. Here I will present CQED experiments with Bose-Einstein condensates and with quantum well polaritons. In both cases, collective atom-light interaction plays a fundamental role, and I will highlight the similarities and differences of the two systems. Both experiments are enabled by a new type of miniature Fabry-Perot cavity using laser-machined optical fibers.

For further informations, please contact Prof. Ruggero Stanga or.