Qubit Applications
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The EU Integrated Project Qubit Applications (or QAP), a partnership of 40 academic and industrial groups at the cutting edge of quantum information research was initiated in 2005, QAP’s mission has been, to develop and implement novel applications for quantum information processing, and to explore theoretical concepts of quantum information. QAP partners have published over 1205 papers in a variety of journals to date, including prestigious titles such as Nature, Science, Physical Review Letters, Nature Photonics among others. These papers mark a significant contribution to the worldwide effort to understand, control and utilize quantum systems, and reflect the diverse range of interests within the collaboration. [read more]


Our series of movies on UTUBE: QUBITLABS

Articles about QAP on 'ICT Results' website

Special: The Dawn of Quantum Information

'Technologies that exploit the unique weirdness of quantum mechanics could debut in the very near future, thanks to the groundbreaking work of a huge European research consortium'.

Special: Computing in Quantum Dimension

'A huge consortium of European researchers is solving some of the fundamental obstacles blocking real quantum computing applications in the short term. At the same time, it is helping to pave the way to a quantum computer'.

(ICT Results is an editorial service created for the European Commission to showcase EU-funded ICT research and activities.




Research highlights

Information Causality - a new principle of physics?                        The principle of Information Causality, states that communication of m classical bits causes information gain of at most m bits. In a recent Physical Review Letter, QAP researchers show that this principle is respected both in classical and quantum physics, and that all stronger than quantum correlations violate it. We suggest that Information Causality, being a generalization of no-signalling, is one of the foundational properties of Nature.  [read more]


Unambiguous comparison of unitary channels            

In a recent Physical Review Letter, two QAP researchers derived the problem of unambiguous comparison of a pair of unknown qubit unitary channels. Using the framework of process positive operator valued measures (PPOVM) they characterize all solutions and identify the optimal ones. They prove that the entanglement is the key ingredient in designing the optimal experiment for comparison of unitary channels. Without entanglement the optimality can not be achieved. The proposed scheme is also experimentally feasible. [read more]