CPT

Calendar of Physics Talks Vienna

Quantum-Optical Analogies in Waveguide-based Optical Structures
Speaker:Marco Ornigotti (Department of Physics, Politecnico di Milano, Italy)
Abstract:The formal analogy that exists between the Schroedinger equation for a quantum particle in presence of a driving field and the Helmoltz equation for light that propagates in a curved optical waveguide is presented.This analogy is then used to demonstrate that either photonic devices can be used as a powerful laboratory tool for mimicking coherent quantum effects that are very difficult to observe in a real quantum system or that thanks to this analogy it is possible to use concepts from the field of quantum control for the management of light in photonic waveguides, opening the way for novel ideas for molding the flow of light along these structures.
Date: Wed, 17.02.2010
Time: 14:00
Location:Ernst-Mach-Hörsaal, Boltzmanngasse 5, 2nd floor, 1090 Wien
Contact:aspelmeyer-office@univie.ac.at

Dissipatively driven entanglement of two macroscopic atomic ensembles
Speaker:Christine Muschik (Max Planck Institute of Quantum Optics, Garching, Germany)
Abstract:Up to date, the live time of entangled states is very short, due to their fragility under decoherence and dissipation. Therefore, they are created under strict isolation conditions. In contrast, new approaches harness the coupling of the system to the environment, which drives the system into the desired state. Following these ideas, we present a scheme for the generation of steady state entanglement between two distant atomic ensembles. Our scheme relies on the interaction of the atomic system with the modes of the electromagnetic field which act as environment. The dissipative evolution can be controlled such that long-lived entanglement is created under realistic experimental condition using current technology.
Date: Thu, 18.02.2010
Time: 14:00
Location:Ernst-Mach-Hörsaal, Boltzmanngasse 5, 2nd floor, 1090 Wien
Contact:aspelmeyer-office@univie.ac.at