Towards a photonic quantum adapter for trapped ions

23 11/2015

Monday, 23 Nov. 2015, 17:30 - 18:30

Presenter: Ben Lanyon
Host: Ivette Fuentes
Where: Ernst-Mach-Hörsaal, 2. Stck., Strudlhofgasse 4, 1090 Wien

A current challenge is to develop quantum networks: distributed nodes of quantum matter, coupled by photonic links [1]. A problem is that different examples of quantum matter - such as atoms, dots or color centers - typically emit and absorb photons at very different frequencies. Networking such systems is therefore extremely challenging. Another problem is that those photons are typically strongly absorbed in optical waveguides, limiting the distance between network nodes. 

A solution to these problems is to develop photon frequency shifters, to convert photons to optimal wavelengths for quantum networking. In this talk, I will present plans to develop and demonstrate a photon converter for trapped atomic ions: one of the candidate systems for network nodes. Specifically, we aim to convert on-demand single photons, emitted by and entangled with a single trapped ion, to the wavelength of minimal absorption in optical fiber (1550 nm). Our five year goal is to observe entanglement between an ion and a photon that has travelled through 50 km of optical fiber. 

Finally, I will outline our plans to build a three-node trapped-ion network, across the Innsbruck University campus.


[1] Kimble, The quantum internet, Nature 453, 1023 (2008).