Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 51: Quantum information: Photons and nonclassical light III

Q 51.8: Talk

Thursday, March 20, 2014, 18:15–18:30, UDL HS3038

A quantum pulse gate for high-dimensional time-frequency quantum information coding — •Benjamin Brecht¹, Vahid Ansari¹, Georg Harder¹, Andreas Eckstein^1,2 und Christine Silberhorn¹ — ¹Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn — ²Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot - Paris 7, Bâtiment Condorcet, Case courrier 7021, 75205 Paris, France

We implement a quantum pulse gate (QPG), which facilitates a controlled single-mode operation on the intricate time-frequency (TF) structure of ultrafast quantum pulses. This structure lends itself to high-dimensional information coding, similar to comparable approaches based on spatial field distributions. In contrast to those however, TF modes are compatible with single-mode fiber networks.

We experimentally retrieve the TF modes of the QPG and demonstrate genuine single-mode operation on input pulses attenuated to the single-photon level, as well as a high degree control over the QPG TF structure. The QPG constitutes an important building block for high-dimensional TF quantum communication and information applications.