Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Information (Concepts and Methods) III
Q 33.4: Vortrag
Dienstag, 6. März 2018, 15:00–15:15, K 1.019
Binary Homodyne Detection of Quadrature Squeezing over Satellite Links — •Christian R. Müller1,2, Kaushik P. Seshadreesan3,1,2, Gerd Leuchs1,2,4, and Christoph Marquardt1,2 — 1Max-Planck-Institut für die Physik des Lichts, Erlangen, Deutschland — 2Department Physik, Friedrich-Alexander-Universität Erlangen Nürnberg (FAU), Erlangen, Deutschland — 3College of Optical Sciences, University of ArizonaTucson (AZ) USA — 4Department of Physics and Max Planck Centre for Extreme and Quantum Photonics, University of Ottawa, Ottawa (ON), Canada
Optical satellite links are a promising candidate to overcome the distance limits of fiber-based quantum key distribution protocols [1]. Moreover, the vast distances and the varying gravitational potential renders optical satellite links an exciting testbed for probing the laws of physics at the interface between quantum mechanics and general relativity.
Quadrature squeezing is a nonlinear effect based on quantum correlations between photons in the optical signal. We demonstrate the feasibility of squeezing detection in a realistic scenario of an optical satellite link. Furthermore, we show that efficient squeezing detection is even feasible in the extreme case of a homodyne detector with merely one bit of resolution - a situation commonly found in long-haul optical communications. Our results pave the way for a timely and cost-efficient realization of fundamental tests of physics.
[1] K. Günthner et al., Optica (4)6 pp.611-616 (2017).