Color Duality in Photons - an "APS Physics Highlight of the Year 2016"
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 Department of Physics, Humboldt-Universität zu 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."
APS/Alan Stonebraker
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.
[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)
News from Jan 03, 2017