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Startpage > News > Calendar of Events > Cavity optomechanics


Cavity optomechanics in new regimes and with new devices: Single-photon strong coupling and dissipative interaction

Theoretisch-Physikalisches Seminar, 23.11.12


In optomechanical systems mechanical degrees of freedom are coupled to the modes of the electromagnetic field inside optical or microwave resonators. Work in this area is largely motivated by building more sensitive mass and force sensors, providing long-range interaction between qubits in quantum information hardware, and probing quantum mechanics at increasingly large mass and length scales [for a recent review, see e.g. Physics Today 65, 29 (2012)].

In most setups the position of the mechanical oscillator linearly modulates the cavity frequency. Several experiments -using ultracold atoms, so-called optomechanical crystals, or superconducting circuits - are approaching the limit where the radiation pressure of a single photon displaces the mechanical oscillator by more than its zero-point uncertainty. I will show how this single-photon strong-coupling regime can be detected in the cavity response as well as the optical output spectrum and that the system exhibits photon-blockade physics inducing non-Gaussian states of the mechanics and non-classical states of light [PRL 107, 063602 (2011)].

I will then discuss optomechanical systems where the position of the mechanical oscillator modulates the cavity line width rather than its frequency. Quantum interference effects then lead to a Fano line shape in the force spectrum. I will outline the implications for sideband cooling as well as the strong coupling regime in these devices.

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Eingeladen von Herrn Prof. Dr. Klemens Hammerer


Dr. Andreas Nunnenkamp/Universität Basel


Institut f√ľr Theoretische Physik


Freitag, 23. November 2012, 16:15 bis 18:00 Uhr


Physikgebäude (Gebäude 3701, Großer Seminarraum 268)
Appelstr. 2, 30167 Hannover

Ein Verschieben des Kartenausschnitts ist mit gedrückter Maustaste möglich.

Die Karte wurde uns freundlicherweise von Herrn Dr. Tobias Dahinden, Institut für Kartographie und Geoinformatik zur Verfügung gestellt.