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of 496
pro vyhledávání: '"Hradil Z"'
The quantum Cram\'er-Rao bound for the joint estimation of the centroid and the separation between two incoherent point sources cannot be saturated. As such, the optimal measurements for extracting maximal information about both at the same time are
Externí odkaz:
http://arxiv.org/abs/2406.17009
Autor:
Peterek, M., Paur, M., Vitek, M., Koutny, D., Stoklasa, B., Motka, L., Hradil, Z., Rehacek, J., Sanchez-Soto, L. L.
Enhancing the ability to resolve axial details is crucial in three-dimensional optical imaging. We provide experimental evidence showcasing the ultimate precision achievable in axial localization using vortex beams. For Laguerre-Gauss (LG) beams, thi
Externí odkaz:
http://arxiv.org/abs/2310.19908
We revisit the application of neural networks techniques to quantum state tomography. We confirm that the positivity constraint can be successfully implemented with trained networks that convert outputs from standard feed-forward neural networks to v
Externí odkaz:
http://arxiv.org/abs/2206.06736
We show that quantum state tomography with perfect knowledge of the measurement apparatus proves to be, in some instances, inferior to strategies discarding all information about the measurement at hand, as in the case of data pattern tomography. In
Externí odkaz:
http://arxiv.org/abs/2106.11850
Autor:
De, Syamsundar, Gil-Lopez, Jano, Brecht, Benjamin, Silberhorn, Christine, Sanchez-Soto, Luis L., Hradil, Z., Rehacek, J.
Publikováno v:
Phys. Rev. Research 3, 033082 (2021)
Measuring small separations between two optical sources, either in space or in time, constitute an important metrological challenge as standard intensity-only measurements fail for vanishing separations. Contrarily, it has been established that appro
Externí odkaz:
http://arxiv.org/abs/2103.10833
Improving axial resolution is of paramount importance for three-dimensional optical imaging systems. Here, we investigate the ultimate precision in axial localization using vortex beams. For Laguerre-Gauss beams, this limit can be achieved with just
Externí odkaz:
http://arxiv.org/abs/2103.04170
We derive fundamental precision bounds for single-point axial localization. For the case of a Gaussian beam, this ultimate limit can be achieved with a single intensity scan, provided the camera is placed at one of two optimal transverse detection pl
Externí odkaz:
http://arxiv.org/abs/1910.04986
Autor:
Ahn, D., Teo, Y. S., Jeong, H., Koutny, D., Rehacek, J., Hradil, Z., Leuchs, G., Sanchez-Soto, L. L.
Publikováno v:
Phys. Rev. A 100, 012346 (2019)
We perform several numerical studies for our recently published adaptive compressive tomography scheme [D. Ahn et al. Phys. Rev. Lett. 122, 100404 (2019)], which significantly reduces the number of measurement settings to unambiguously reconstruct an
Externí odkaz:
http://arxiv.org/abs/1905.01488
Akademický článek
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Autor:
Ahn, D., Teo, Y. S., Jeong, H., Bouchard, F., Hufnagel, F., Karimi, E., Koutny, D., Rehacek, J., Hradil, Z., Leuchs, G., Sanchez-Soto, L. L.
Publikováno v:
Phys. Rev. Lett. 122, 100404 (2019)
Quantum state tomography is both a crucial component in the field of quantum information and computation, and a formidable task that requires an incogitably large number of measurement configurations as the system dimension grows. We propose and expe
Externí odkaz:
http://arxiv.org/abs/1812.05289