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30. December 2016

Color Duality in Photons

Work of the physicist Sven Ramelow selected as one of the “Highlights of the Year 2016”

Color Duality in Photons
The illustration shows the conversion of a photon of one frequency, or color, into a photon that is in a quantum superposition of two colors, and the subsequent verification of this super-positions coherence with Ramsey spectroscopy. Credit: APS/Alan Stonebraker

The paper “Ramsey Interference with Single Photons”[1] and accompanying Viewpoint “Photon Qubit is Made of Two Colors”[2] have been selected as one of the Highlights of the Year 2016 by APS Physics. It was co-authored by Dr. Sven Ramelow, who recently started his Emmy-Noether-Group at the Institute for Physics, Humboldt-University Berlin, and is associated with IRIS Adlershof.

While there have numerous highly interesting papers in Physical Review Letters in 2016, APS Physics explains their selection, writing: “It’s no surprise that LIGO’s discovery of gravitational waves tops our list of favorite Physics stories in 2016. The other slots went to research that marked a change in perspective, demonstrated an impressive experimental feat, or simply made us think.”

Incidentally, Dr. Sven Ramelow is working on follow-up ideas and experiments of this paper, which he looks forward to soon being implemented at the HU Physics Department and at IRIS Adlershof and yielding new intriguing results.

[1] “Ramsey Interference with Single Photons”, Stéphane Clemmen, Alessandro Farsi, Sven Ramelow, Alexander L. Gaeta, Phys. Rev. Lett. 117, 223601 (2016)
[2] “Viewpoint: Photon Qubit is Made of Two Colors”, Philipp Treutlein, Physics 9, 135 (2016)

Further Information:

IRIS Adlershof
Humboldt-Universität zu Berlin
Zum Großen Windkanal 6, 12489 Berlin
Tel.: +49 30 2093-66350
Fax: +49 30 2093-66351
Email: office(at)iris-adlershof.de

www.iris-adlershof.de

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The development of the Science and Technology Park Berlin Adlershof was and is co-financed by the European Union namely by EFRE. This concerns infrastructure development like construction of technology centres. Furthermore EFRE is used for international projects.

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