We demonstrate that the contextuality of measurement selection can enhance the precision of quantum metrology with a simple linear optical experiment. Contextuality is a nonclassical property known as a resource for various quantum information processing tasks. Recent studies show that contextuality by anoma...
The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies. Fields covered include, but are not limited to, quantum computing and quantum communication, includ...
Future-proofing current fibre networks with quantum key distribution (QKD) is an attractive approach to combat the ever growing breaches of data theft. To succeed, this approach must offer broadband transport of quantum keys, efficient quantum key delive
such as quantum key distribution (QKD)1,2,3,4, quantum teleportation5,6,7, quantum-enhanced metrology8,9, and linear optical quantum information processing (LOQC)10,11. Approaches, such as cascaded emissions in single-emitters12,13and spontaneous parametric processes14,15,16,17,18,19,...
Time-series processing is a major challenge in machine learning with enormous progress in the last years in tasks such as speech recognition and chaotic series prediction. A promising avenue for sequential data analysis is quantum machine learning, with
npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications. The set of journals have been ranked according to their SJR and divided into four equal groups, fou...
npj Quantum Information volume 7, Article number: 39 (2021) Cite this article 5670 Accesses 16 Citations 11 Altmetric Metrics details Abstract Quantum sensing exploits the strong sensitivity of quantum systems to measure small external signals. The nitrogen-vacancy (NV) center in diamond is one of...
npj Quantum Information volume 7, Article number: 125 (2021) Cite this article 3597 Accesses 3 Altmetric Metrics details Abstract Quantum imaging can beat classical resolution limits, imposed by the diffraction of light. In particular, it is known that one can reduce the image blurring and ...
Spins are prototypical systems with the potential to probe magnetic fields down to the atomic scale limit. Exploiting their quantum nature through appropriate sensing protocols allows to enlarge their applicability to fields not always accessible by clas
improvement is achieved without significantly increasing the computational cost of data generation; see theSupplementary Information. Lastly, similar to the results obtained for alanine dipeptide, AL with a more advanced selection strategy outperforms experiments where training data is picked at random; ...