CNR glass chip

Posted by on apr 22, 2013 in Corporate News, Sustainability Mission | 0 comments

CNR glass chip

A micro-laboratory inside a glass chip

The smallest “laboratory” able to simulate complex quantum physical phenomena lies inside a glass chip. This was created by a group of researchers from the Sapienza Physics Department, the Institute for Photonics and Nanotechnologies (Ifn-Cnr) and the Politecnico di Milano.The device, which uses photons to send data, is one of the first steps towards the processor of the future with a computing capacity far beyond that of today.

Here we report the experimental observation of three-photon interference in an integrated three-port directional coupler realized by ultrafast laser writing. By exploiting the capability of this technique to produce three-dimensional structures, the authors, coordinated by Fabio Sciarrino, Sapienza, realized, and tested in the quantum regime a three-port beam splitter, namely a tritter, which allowed them to observe bosonic coalescence of three photons. These results open new important perspectives in many areas of quantum information, such as fundamental tests of quantum mechanics with increasing number of photons, quantum state engineering, quantum sensing and quantum simulation.

The extraordinary progress made during the last years thanks to modern quantum technologies can make possible the isolation, manipulation, control and the identification of single particles.
The potential applications range from quantum cryptography to quantum physical phenomenon simulation and quantum computing. The photonic computers offer a series of advantages concerning performances, but also technical characteristics and energy consumption. In the future computers may be smaller, lighter and consume less. They might be charged with solar light without superheating problems and have optical fiber nets integrated directly.

The studies have been published in Nature Communications e Nature Photonics. The research was funded by an Erc (European research council) Starting Grant: 3D-Quest (3D-Quantum integrated otical smulation) project, coordinated by Fabio Sciarrino.

Read the paper:

Source: Rome University

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