Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Sanchez-Soto L. L."'
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:
Teo, Y. S., Shringarpure, S. U., Jeong, H., Prasannan, N., Brecht, B., Silberhorn, C., Evans, M., Mogilevtsev, D., Sanchez-Soto, L. L.
Publikováno v:
Phys. Rev. A 110, 012231 (2024)
We introduce the framework of Bayesian relative belief that directly evaluates whether or not the experimental data at hand supports a given hypothesis regarding a quantum system by directly comparing the prior and posterior probabilities for the hyp
Externí odkaz:
http://arxiv.org/abs/2406.03343
Autor:
Teo, Y. S., Jeong, H., Prasannan, N., Brecht, B., Silberhorn, C., Evans, M., Mogilevtsev, D., Sanchez-Soto, L. L.
Publikováno v:
Phys. Rev. Lett. 133, 050204 (2024)
Identifying a reasonably small Hilbert space that completely describes an unknown quantum state is crucial for efficient quantum information processing. We introduce a general dimension-certification protocol for both discrete and continuous variable
Externí odkaz:
http://arxiv.org/abs/2401.01562
Autor:
Vitek Marek, Peterek Michal, Koutny Dominik, Paur Martin, Stoklasa Bohumil, Motka Libor, Hradil Zdenek, Rehacek Jaroslav, Sanchez-Soto L. L.
Publikováno v:
EPJ Web of Conferences, Vol 266, p 10012 (2022)
We show the coherence properties of a signal can be measured by a Hartmann wavefront sensor in a nonclassical regime. Recasting the detection theory of the classical Hartmann sensor in the sense of quantum tomography enables to measure the coherence
Externí odkaz:
https://doaj.org/article/39c7ce897df14bfe837da49a7d48b6e2
Autor:
Najafabadi, M. S., Sánchez-Soto, L. L., Corney, J. F., Kalinin, N., Sorokin, A. A., Leuchs, G.
Publikováno v:
Phys. Rev. Research ( 2024)
We study the quantum squeezing produced in self-induced transparency in a photonic crystal fiber by performing a fully quantum simulation based on the positive $P$ representation. The amplitude squeezing depends on the area of the initial pulse: when
Externí odkaz:
http://arxiv.org/abs/2311.02032
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
Publikováno v:
Quantum 8, 1363 (2024)
Coherent-state representations are a standard tool to deal with continuous-variable systems, as they allow one to efficiently visualize quantum states in phase space. Here, we work out an alternative basis consisting of monomials on the basic observa
Externí odkaz:
http://arxiv.org/abs/2309.10042
Publikováno v:
Phys. Rev. Research 5, 033198 (2023)
Quantum theory allows the traversing of multiple channels in a superposition of different orders. When the order in which the channels are traversed is controlled by an auxiliary quantum system, various unknown parameters of the channels can be estim
Externí odkaz:
http://arxiv.org/abs/2309.07220
Autor:
Butt, M. A. T., Roth, P., Wong, G. K. L., Frosz, M. H., Sanchez-Soto, L. L., Anashkina, E. A., Andrianov, A. V., Banzer, P., Russell, P. S. J., Leuchs, G.
Polarization-preserving fibers maintain the two polarization states of an orthogonal basis. Quantum communication, however, requires sending at least two nonorthogonal states and these cannot both be preserved. We present a new scheme that allows for
Externí odkaz:
http://arxiv.org/abs/2305.11220
The Schr\"{o}dinger equation admits smooth and finite solutions that spontaneously evolve into a singularity, even for a free particle. This blowup is generally ascribed to the intrinsic dispersive character of the associated time evolution. We resor
Externí odkaz:
http://arxiv.org/abs/2301.13207