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Seminar - Strong coupling in quantum optics: exciton-polaritons and phonon-polaritons

on 09-03-2015


Hugo Terças, Institute for Theoretical Physics, University of Innsbruck

09/03/2015, 10:00 -- Please note exceptional day and time
Room P3.10, Mathematics Building, Mathematics Building, IST

Strong coupling in quantum mechanical systems occurs when the strength of the coupling is much larger than losses. Such a feature can be found in optical cavities, where the atoms strongly couple to the cavity photonic modes (cavity QED). The same occurs in semi-conductor microcavities, where excitons strongly couple to photons. In these systems, the resulting quasi-particle, the so-called polariton, results from the hybridisation of a typical excitation with photons. In this talk, I will discuss two examples involving ultracold atoms where strong coupling involves a phonon mode, giving rise to an acoustic-like quasi-particle: the phonon-polariton. Some relations with the research in the domain of exciton-polaritons and its applications will be drawn.

Quantum Computation and Information Seminar

Support: Phys-Info (IT), SQIG (IT), CFIF and CAMGSD, with support from FCT, FEDER and EU FP7, namely via the Doctoral Programme in the Physics and Mathematics of Information (DP-PMI), and projects PEst-OE/EEI/LA0008/2013, UID/EEA/50008/2013, QuSim, CQVibes, Landauer (318287) and PAPETS (323901).

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