Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Francesco Graffitti"'
Autor:
Alexander Pickston, Joseph Ho, Andrés Ulibarrena, Federico Grasselli, Massimiliano Proietti, Christopher L. Morrison, Peter Barrow, Francesco Graffitti, Alessandro Fedrizzi
Publikováno v:
npj Quantum Information, Vol 9, Iss 1, Pp 1-6 (2023)
Abstract Quantum conference key agreement (QCKA) allows multiple users to establish a secure key from a shared multi-partite entangled state. In a quantum network, this protocol can be efficiently implemented using a single copy of a N-qubit Greenber
Externí odkaz:
https://doaj.org/article/72526e96130c49b8a5dc108c0af85b3e
Autor:
Christopher L. Morrison, Roberto G. Pousa, Francesco Graffitti, Zhe Xian Koong, Peter Barrow, Nick G. Stoltz, Dirk Bouwmeester, John Jeffers, Daniel K. L. Oi, Brian D. Gerardot, Alessandro Fedrizzi
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Abstract Quantum key distribution with solid-state single-photon emitters is gaining traction due to their rapidly improving performance and compatibility with future quantum networks. Here we emulate a quantum key distribution scheme with quantum-do
Externí odkaz:
https://doaj.org/article/2305a86428d24c8db18f3d29b3810192
Autor:
Joseph Ho, George Moreno, Samuraí Brito, Francesco Graffitti, Christopher L. Morrison, Ranieri Nery, Alexander Pickston, Massimiliano Proietti, Rafael Rabelo, Alessandro Fedrizzi, Rafael Chaves
Publikováno v:
npj Quantum Information, Vol 8, Iss 1, Pp 1-7 (2022)
Abstract Efficient distributed computing offers a scalable strategy for solving resource-demanding tasks, such as parallel computation and circuit optimisation. Crucially, the communication overhead introduced by the allotment process should be minim
Externí odkaz:
https://doaj.org/article/4628de151a11409bb976f3bd1e70dad6
Autor:
Christopher L. Morrison, Francesco Graffitti, Peter Barrow, Alexander Pickston, Joseph Ho, Alessandro Fedrizzi
Publikováno v:
APL Photonics, Vol 7, Iss 6, Pp 066102-066102-6 (2022)
Frequency encoding is quickly becoming an attractive prospect for quantum information protocols owing to larger Hilbert spaces and increased resilience to noise compared to other photonic degrees of freedom. To fully make use of frequency encoding as
Externí odkaz:
https://doaj.org/article/8ecff657891a462cabfd0c5f04615c37
Autor:
Gonzalo Carvacho, Francesco Graffitti, Vincenzo D’Ambrosio, Beatrix C. Hiesmayr, Fabio Sciarrino
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
Abstract Greenberger-Horne-Zeilinger (GHZ) states and their mixtures exhibit fascinating properties. A complete basis of GHZ states can be constructed by properly choosing local basis rotations. We demonstrate this experimentally for the Hilbert spac
Externí odkaz:
https://doaj.org/article/4c53e9f3b6284175b7c9bf2d90eb071c
Autor:
Francesco Graffitti, Vincenzo D'Ambrosio, Massimiliano Proietti, Joseph Ho, Bruno Piccirillo, Corrado de Lisio, Lorenzo Marrucci, Alessandro Fedrizzi
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043350 (2020)
Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noi
Externí odkaz:
https://doaj.org/article/fcc1ff52f96b4d038d9c4ff9e35ed906
Autor:
Zhe Xian Koong, Nick Stoltz, Brian D. Gerardot, Dirk Bouwmeester, Alessandro Fedrizzi, Christopher L. Morrison, Francesco Graffitti
Publikováno v:
Quantum Technology: Driving Commercialisation of an Enabling Science II.
A source of bright and pure single photons is an essential tool for photonic quantum technologies, predicted to enable secure communication and networking. Self-assembled quantum dots are among the leading candidates to realise such a source. The cur
Autor:
Fiona Thorburn, Dirk Bouwmeester, Zhe Xian Koong, Markus Rambach, Nick Stoltz, Francesco Graffitti, Jin Dong Song, Yong Ma, Brian D. Gerardot, Christopher L. Morrison, Suk In Park, Alessandro Fedrizzi, Ajoy Kumar Kar
Publikováno v:
Applied Physics Letters, 118(17)
Applied Physics Letters
Applied Physics Letters
On-demand indistinguishable single photon sources are essential for quantum networking and communication. Semiconductor quantum dots are among the most promising candidates, but their typical emission wavelength renders them unsuitable for use in fib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a7c74087910e490b0a565c218bb2c0c
https://hdl.handle.net/1887/3256499
https://hdl.handle.net/1887/3256499
Autor:
Agata M. Brańczyk, Alexander Pickston, Christopher L. Morrison, Peter Barrow, Francesco Graffitti, Joseph Ho, Alessandro Fedrizzi
Publikováno v:
Optics express. 29(5)
The ideal photon-pair source for building up multi-qubit states needs to produce indistinguishable photons with high efficiency. Indistinguishability is crucial for minimising errors in two-photon interference, central to building larger states, whil
Autor:
Alessandro Fedrizzi, Ajoy K. Kar, Francesco Graffitti, Jin Dong Song, Y. Ma, Brian D. Gerardot, Christopher L. Morrison, Suk-In Park, Markus Rambach, Zhe Xian Koong, Fiona Thorburn
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate frequency-conversion of quantum dot photons to the telecom C-band enabled by a custom-built, tunable mid-infrared laser. We achieve high brightness while preserving the photons’ coherence properties, outperforming state-of-the-art so