Creating and sharing knowledge for telecommunications

Light-matter entanglement over 50 km of optical fibre


on 16-07-2019

... Ben Lanyon, Institute for Quantum Optics and Quantum Information and the University of Innsbruck

Date & time: Tuesday, July 16th, 15:00h
Location: Sala de formação avançada, 2nd floor of the Physics Department building, IST

Abstract:
When shared between remote locations, entanglement opens up fundamentally new capabilities for science and technology. Envisioned quantum networks use light to distribute entanglement between their remote matter-based quantum nodes. In this short talk, I will present our observation of entanglement between matter (a trapped ion) and light (a photon) over 50 km of optical fibre [1]: two orders of magnitude further than the state of the art and a practical distance to start building large-scale quantum networks. Our methods include an efficient source of ion-photon entanglement via cavity-QED techniques (0.5 probability on-demand fibre-coupled photon from the ion) and a single photon quantum frequency converter to the 1550 nm telecom C band (0.25 fibre-coupled device efficiency). Modestly optimising and duplicating our system could allow for 100 km-spaced ion-ion entanglement at rates over 1 Hz. Our results therefore show a path to entangling remote registers of quantum-logic capable trapped-ion qubits, and the optical atomic clock transitions that they contain, spaced by hundreds of kilometres. More Information..

International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design – SMACD19


on 15-07-2019

... This forum will be devoted to modeling, simulation and synthesis for Analog, Mixed-signal, RF (AMS/RF) and multi-domain (MEMs, nanoelectronics, optoelectronics, biological, etc.) integrated circuits and systems. Experiences with modeling, simulation and synthesis techniques in diverse application areas are also welcomed. Objective technologies include CMOS, beyond CMOS, and More-than- Moore such as MEMs, power devices, sensors, passives, etc.
SMACD19 will be held in Lausanne, Switzerland, and is Technically Co-sponsored by IEEE, IEEE CEDA and IEEE CAS.
More Information..