Zobrazeno 1 - 10
of 291
pro vyhledávání: '"Sangouard N"'
The Wineland parameter aims at detecting metrologically useful entangled states, called spin-squeezed states, from expectations and variances of total angular momenta. Efficient strategies for estimating this parameter in practice have yet to be dete
Externí odkaz:
http://arxiv.org/abs/2410.23741
Autor:
Krutyanskiy, V., Galli, M., Krcmarsky, V., Baier, S., Fioretto, D. A., Pu, Y., Mazloom, A., Sekatski, P., Canteri, M., Teller, M., Schupp, J., Bate, J., Meraner, M., Sangouard, N., Lanyon, B. P., Northup, T. E.
Publikováno v:
Phys. Rev. Lett. 130, 050803 (2023)
We report on an elementary quantum network of two atomic ions separated by 230 m. The ions are trapped in different buildings and connected with 520(2) m of optical fiber. At each network node, the electronic state of an ion is entangled with the pol
Externí odkaz:
http://arxiv.org/abs/2208.14907
Autor:
Nadlinger, D. P., Drmota, P., Nichol, B. C., Araneda, G., Main, D., Srinivas, R., Lucas, D. M., Ballance, C. J., Ivanov, K., Tan, E. Y-Z., Sekatski, P., Urbanke, R. L., Renner, R., Sangouard, N., Bancal, J-D.
Publikováno v:
Nature 607, 682-686 (2022)
Cryptographic key exchange protocols traditionally rely on computational conjectures such as the hardness of prime factorisation to provide security against eavesdropping attacks. Remarkably, quantum key distribution protocols like the one proposed b
Externí odkaz:
http://arxiv.org/abs/2109.14600
Publikováno v:
Quantum 5, 444 (2021)
Device-independent quantum key distribution aims at providing security guarantees even when using largely uncharacterised devices. In the simplest scenario, these guarantees are derived from the CHSH score, which is a simple linear combination of fou
Externí odkaz:
http://arxiv.org/abs/2009.01784
Publikováno v:
Phys. Rev. Lett. 124, 230502 (2020)
Device-independent quantum key distribution provides security even when the equipment used to communicate over the quantum channel is largely uncharacterized. An experimental demonstration of device-independent quantum key distribution is however cha
Externí odkaz:
http://arxiv.org/abs/2005.13015
Autor:
Meraner, M., Mazloom, A., Krutyanskiy, V., Krcmarsky, V., Schupp, J., Fioretto, D., Sekatski, P., Northup, T. E., Sangouard, N., Lanyon, B. P.
Publikováno v:
Phys. Rev. A 102, 052614 (2020)
Trapped atomic ions embedded in optical cavities are a promising platform to enable long-distance quantum networks and their most far-reaching applications. Here we achieve and analyze photon indistinguishability in a telecom-converted ion-cavity sys
Externí odkaz:
http://arxiv.org/abs/1912.09259
Publikováno v:
npj Quantum Inf 5, 115 (2019)
The vision to develop quantum networks entails multi-user applications, which require the generation of long-distance multi-party entangled states. The current rapid experimental progress in building prototype-networks calls for new design concepts t
Externí odkaz:
http://arxiv.org/abs/1905.00335
Publikováno v:
Quantum 1, 7 (2017)
We give a complete proposal showing how to detect the non-classical nature of photonic states with naked eyes as detectors. The enabling technology is a sub-Poissonian photonic state that is obtained from single photons, displacement operations in ph
Externí odkaz:
http://arxiv.org/abs/1611.08542
Publikováno v:
Quantum Sci. Technol. 2 044001 (2017)
Quantum repeaters provide an efficient solution to distribute Bell pairs over arbitrarily long distances. While scalable architectures are demanding regarding the number of qubits that need to be controlled, here we present a quantum repeater scheme
Externí odkaz:
http://arxiv.org/abs/1611.07779
Publikováno v:
Phys. Rev. A 94, 052307 (2016)
The endeavour to develop quantum networks gave rise to a rapidly developing field with far reaching applications such as secure communication and the realisation of distributed computing tasks. This ultimately calls for the creation of flexible multi
Externí odkaz:
http://arxiv.org/abs/1604.05352