Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Quantum Information: Photons and Nonclassical Light III

Q 66.1: Talk

Friday, March 12, 2010, 14:00–14:15, E 214

Squeezing in Radially and Azimuthally Polarized Doughnut Modes — •Christian Gabriel^1,2, Wenjia Zhong^1,2, Andrea Aiello^1,2, Peter Banzer^1,2, Dominique Elser^1,2, Michael Förtsch^1,2, Ulrik L. Andersen^1,2,3, Christoph Marquardt^1,2, and Gerd Leuchs^1,2 — ¹Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1, 91058 Erlangen, Germany — ²Institute for Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, 91058 Erlangen, Germany — ³Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

So far experiments in quantum imaging have solely concentrated on taking advantage of the spatial properties of light. However, exploiting more than one degree of freedom, such as the spatial mode as well as the polarization, offers new opportunities to improve continuous variable quantum information processing protocols. We present a theoretical investigation of squeezed states in an azimuthally and radially polarized doughnut mode. These not only have a complex spatial but also a complex polarization structure. Squeezing in these modes is a manifestation of entanglement between two other spatio-polarization modes which are symmetric and antisymmetric superpositions of the initial modes; for example the vertically polarized TEM01 mode and the horizontally polarized TEM10 mode in the case of a quantum noise reduction of a radially polarized doughnut mode and its counter part.