Zobrazeno 1 - 10
of 57
pro vyhledávání: '"John Calsamiglia"'
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033329 (2024)
We consider the problem of correctly identifying a malfunctioning quantum device that forms part of a network of N such devices, which can be considered as the quantum analog of classical anomaly detection. In the case where the devices in question a
Externí odkaz:
https://doaj.org/article/4fd486e910a740d19a91eebaf3f62345
Publikováno v:
Quantum, Vol 8, p 1289 (2024)
We consider a quantum system that is being continuously monitored, giving rise to a measurement signal. From such a stream of data, information needs to be inferred about the underlying system's dynamics. Here we focus on hypothesis testing problems
Externí odkaz:
https://doaj.org/article/a01a10a3a8b14f0297d542d8f8f6cc78
Publikováno v:
Quantum, Vol 5, p 608 (2021)
We study the problem of transmitting classical information using quantum Gaussian states on a family of phase-noise channels with a finite decoherence time, such that the phase-reference is lost after $m$ consecutive uses of the transmission line. Th
Externí odkaz:
https://doaj.org/article/04fbc42b0383405aa4ca79c69ba90fa3
Autor:
María García Díaz, Benjamin Desef, Matteo Rosati, Dario Egloff, John Calsamiglia, Andrea Smirne, Michaelis Skotiniotis, Susana F. Huelga
Publikováno v:
Quantum, Vol 4, p 249 (2020)
Quantum coherence generated in a physical process can only be cast as a potentially useful resource if its effects can be detected at a later time. Recently, the notion of non-coherence-generating-and-detecting (NCGD) dynamics has been introduced and
Externí odkaz:
https://doaj.org/article/c6c8707e675a46e6966bbb5ff9d3e83d
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 012044 (2020)
It is by now well established that there exist nonlocal games for which the best entanglement-assisted performance is not better than the best classical performance. Here we show in contrast that any two-player XOR game, for which the corresponding B
Externí odkaz:
https://doaj.org/article/630fcf9998d347ae99ccd5dc3dc795ed
Publikováno v:
Physical Review X, Vol 9, Iss 4, p 041029 (2019)
We introduce the problem of unsupervised classification of quantum data, namely, of systems whose quantum states are unknown. We derive the optimal single-shot protocol for the binary case, where the states in a disordered input array are of two type
Externí odkaz:
https://doaj.org/article/2dd0f1f77043465c813abfa113b195a2
Autor:
María García Díaz, Kun Fang, Xin Wang, Matteo Rosati, Michalis Skotiniotis, John Calsamiglia, Andreas Winter
Publikováno v:
Quantum, Vol 2, p 100 (2018)
Coherent superposition is a key feature of quantum mechanics that underlies the advantage of quantum technologies over their classical counterparts. Recently, coherence has been recast as a resource theory in an attempt to identify and quantify it in
Externí odkaz:
https://doaj.org/article/6bae3a1086514849af0d43abda6aff6a
Publikováno v:
New Journal of Physics, Vol 14, Iss 10, p 105015 (2012)
We address the problem of estimating pure qubit states with non-ideal (noisy) measurements in the multiple-copy scenario, where the data consist of a number N of identically prepared qubits. We show that the average fidelity of the estimates can incr
Externí odkaz:
https://doaj.org/article/aba2c3e05bbe46648abed4449b066263
Publikováno v:
Europhysics Letters. 140:28001
Operating quantum sensors and quantum computers would make data in the form of quantum states available for purely quantum processing, opening new avenues for studying physical processes and certifying quantum technologies. In this Perspective, we re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::218e4bf2db01b2fd9acbc79c8c3a5e2f
https://doi.org/10.1209/0295-5075/ac9c29
https://doi.org/10.1209/0295-5075/ac9c29
Publikováno v:
ITW
2021 IEEE Information Theory Workshop (ITW)
2021 IEEE Information Theory Workshop (ITW)
We study the problem of calibrating a quantum receiver for optical coherent states when transmitted on a quantum optical channel with variable transmissivity, a common model for long-distance optical-fiber and free/deep-space optical communication. W
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfb0954aa643ec298bdac23dae65a1ad