Hannover 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 54: Quantum information: Photons and nonclassical light I
Q 54.1: Gruppenbericht
Donnerstag, 21. März 2013, 14:00–14:30, E 001
Ultrafast multi-mode quantum optics — •Andreas Christ1, Benjamin Brecht1, Georg Harder1, Vahid Ansari1, Kaisa Laiho1, Andreas Eckstein2, and Christine Silberhorn1 — 1Applied Physics, University of Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 2Equipe DON, Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7
Ultrafast single-mode quantum states of light constitute a basic building block for quantum enhanced applications. For quantum networking applications, people usually consider the combined use of several distinct sources to enlarge the available Hilbert space. As an alternative we harness the intrinsic multi-mode structure of high dimensional ultrafast quantum states, which, for example, enables multiplexed quantum communication protocols.
As a first step, we present the creation of multi-mode pulsed quantum states of light, based on ultrafast waveguided parametric down-conversion (PDC). Engineering the PDC process enables us to excite a tuneable number of ultrafast modes.
Secondly, in order to characterize the number of emitted modes and to benchmark our sources we introduce broadband correlation function measurements and show how they are able to resolve the multi-mode nature of the created quantum states.
Finally, it is essential for further applications to individually address the different pulse modes. Here we discuss quantum pulse gates, based on engineered ultrafast frequency conversion processes, which are able to separate individual pulse modes from multi-mode quantum states.