Quantum nonlinear optics: Nonlinear optics meets the quantum world
Zeit
Sprecher:innen
- Prof. Dr. Robert W. Boyd
Dateien
Im Berliner Physikalischen Kolloquium im Magnus-Haus hat
Prof. Dr. Robert W. Boyd,
Department of Physics, University of Ottawa, Ottawa, Canada,
Institute of Optics, University of Rochester, Rochester, New York, USA, and
School of Physics and Astronomy, University of Glasgow, United Kingdom,
vorgetragen.
Zusammenfassung
Nonlinear optics is the key enabling technology for the blossoming field of quantum information science. The nonlinear optical processes of parametric down conversion and squeezed light generation are dominant processes in many quantum information protocols. From a different perspective, nonlinear optical effects such as self-action effects can modify the quantum statistics of light fields, leading either to advantageous or detrimental effects to various quantum protocols. Within this presentation, we illustrate these points through use of several examples.
Image formation making use of quantum states of light allows for dramatic new possibilities in the field of image science. As another example, we are currently developing a system to perform quantum key distribution at a high transmission rate by exploiting the transverse degree of freedom of the photon. We have also demonstrated that security protocols related to that of the BB84 protocol of quantum key distribution can be used to perform secure surveillance, that is, to ensure that image information in a scene of view has not been compromised. The final topic to be described is work aimed at the direct measurement of the quantum wavefunction.