Parts | Days | Selection | Search | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 51: Hertha-Sponer Preisträgervortrag

Q 51.1: Prize Talk

Thursday, March 22, 2007, 11:30–12:00, 5L

Quantum communication based on photon counting and integrated optics — •Christine Silberhorn — Max Planck Forschungsgruppe IOIP, Günther Scharowskystr 1 / Bau 24, 91058 Erlangen

Conventional quantum communication systems are typically either based on single photon protocols or on so-called continuous variable states with Gaussian phase space representations. The characterisation of multi-photon states of most experimental work in the field is based on homodyne detection where photon numbers cannot be distinguished. A recent development employs conditioning single-photon detection to generate highly non-classical non-Gaussian states from Gaussian single-mode squeezed states. Photon number resolved detection can be accomplished in cost-effective linear fibre networks and provides a new promising tool for conditioning state preparation and applications in quantum communication. In this talk we present a new method to measure directly the photon statistics of non-classical light. We exploit a priori information of the state generation process to obtain loss-tolerant photonic state characterization, which is crucial for the observation of many quantum characteristics. For the generation of non-classical light we employ highly efficient wave guided parametric down conversion sources. In conjunction with number resolved photon counting these sources can be utilized to implement effective quantum key distribution.

100% | Screen Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2007 > Düsseldorf