Atmospheric channel characteristics for quantum communication with continuous polarization variables

Heim B, Elser DA, Bartley T, Sabuncu M, Wittmann C, Sych D, Marquardt C, Leuchs G (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Applied Physics B-Lasers and Optics Springer Verlag (Germany)

Publisher: Springer Verlag (Germany)

Book Volume: 98

Pages Range: 635-640

DOI: 10.1007/s00340-009-3838-8

Abstract

We investigate the properties of an atmospheric channel for free space quantum communication with continuous polarization variables. In our prepare-and-measure setup, coherent polarization states are transmitted through an atmospheric quantum channel of 100 m length on the flat roof of our institute's building. The signal states are measured by homodyne detection with the help of a local oscillator (LO) which propagates in the same spatial mode as the signal, orthogonally polarized to it. Thus the interference of signal and LO is excellent and atmospheric fluctuations are auto-compensated. The LO also acts as a spatial and spectral filter, which allows for unrestrained daylight operation. Important characteristics for our system are atmospheric channel influences that could cause polarization, intensity and position excess noise. Therefore we study these influences in detail. Our results indicate that the channel is suitable for our quantum communication system in most weather conditions.

Authors with CRIS profile

Bettina Heim Lehrstuhl für Experimentalphysik (Optik) Dominique Elser Lehrstuhl für Experimentalphysik (Optik) Christoffer Wittmann Lehrstuhl für Experimentalphysik (Optik) Christoph Marquardt Lehrstuhl für Experimentalphysik (Optik) Gerhard Leuchs Lehrstuhl für Experimentalphysik (Optik)

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Heim, B., Elser, D.A., Bartley, T., Sabuncu, M., Wittmann, C., Sych, D.,... Leuchs, G. (2010). Atmospheric channel characteristics for quantum communication with continuous polarization variables. Applied Physics B-Lasers and Optics, 98, 635-640. https://dx.doi.org/10.1007/s00340-009-3838-8

MLA:

Heim, Bettina, et al. "Atmospheric channel characteristics for quantum communication with continuous polarization variables." Applied Physics B-Lasers and Optics 98 (2010): 635-640.

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