Zobrazeno 1 - 10
of 239
pro vyhledávání: '"Xavier, Guilherme"'
Autor:
Spegel-Lexne, Daniel, Gómez, Santiago, Argillander, Joakim, Pawłowski, Marcin, Dieguez, Pedro R., Alarcón, Alvaro, Xavier, Guilherme B.
Wave-particle duality is one of the most striking and counter-intuitive features of quantum mechanics, illustrating that two incompatible observables cannot be measured simultaneously with arbitrary precision. In this work, we experimentally demonstr
Externí odkaz:
http://arxiv.org/abs/2407.03797
Autor:
Alarcón, Alvaro, Gómez, Santiago, Spegel-Lexne, Daniel, Argillander, Joakim, Cariñe, Jaime, Cañas, Gustavo, Lima, Gustavo, Xavier, Guilherme B.
The orbital angular momentum (OAM) spatial degree of freedom of light has been widely explored in many applications, including telecommunications, quantum information and light-based micro-manipulation. The ability to separate and distinguish between
Externí odkaz:
http://arxiv.org/abs/2306.16472
Autor:
Santagiustina, Francesco B. L., Agnesi, Costantino, Alarcón, Alvaro, Cabello, Adán, Xavier, Guilherme B., Villoresi, Paolo, Vallone, Giuseppe
Publikováno v:
Optica Vol. 11, Issue 4, pp. 498-511 (2024)
Time-bin (TB) and energy-time (ET) entanglement are crucial resources for long-distance quantum information processing. Recently, major efforts have been made to produce compact high-quality sources of TB/ET entangled photons based on solid-state int
Externí odkaz:
http://arxiv.org/abs/2302.06522
Autor:
Argillander, Joakim, Alarcón, Alvaro, Bao, Chunxiong, Kuang, Chaoyang, Lima, Gustavo, Gao, Feng, Xavier, Guilherme B.
The recent development of perovskite light emitting diodes (PeLEDs) has the potential to revolutionize the fields of optical communication and lighting devices, due to their simplicity of fabrication and outstanding optical properties. Here we demons
Externí odkaz:
http://arxiv.org/abs/2212.09773
Publikováno v:
J. Opt. 24, 064010 (2022)
Quantum random number generators (QRNG) are based on the naturally random measurement results performed on individual quantum systems. Here, we demonstrate a branching-path photonic QRNG implemented with a Sagnac interferometer with a tunable splitti
Externí odkaz:
http://arxiv.org/abs/2205.04484
Autor:
Xavier, Guilherme B., Lima, Gustavo
Publikováno v:
Commun. Phys. 3, 9 (2020)
The optical fibre is an essential tool for our communication infrastructure since it is the main transmission channel for optical communications. The latest major advance in optical fibre technology is spatial division multiplexing (SDM), where new f
Externí odkaz:
http://arxiv.org/abs/1905.12644
Autor:
Lin, Rui, Udalcovs, Aleksejs, Ozolins, Oskars, Pang, Xiaodan, Gan, Lin, Shen, Li, Tang, Ming, Fu, Songnian, Popov, Sergei, Yang, Chen, Tong, Weijun, Liu, Deming, Silva, Thiago Ferreira, Xavier, Guilherme B., Chen, Jiajia
We experimentally characterize photon leakage from 112Gbps data channels in both non-trench and trench-assistant 7-core fibers, demonstrating telecom compatibility for QKD co-existing with high-speed data transmission when a proper core/wavelength al
Externí odkaz:
http://arxiv.org/abs/1812.04714
Autor:
Aguilar, Edgar A., Farkas, Máté, Martínez, Daniel, Alvarado, Matías, Cariñe, Jaime, Xavier, Guilherme B., Barra, Johanna F., Cañas, Gustavo, Pawłowski, Marcin, Lima, Gustavo
Publikováno v:
Phys. Rev. Lett. 120, 230503 (2018)
We report on a new class of dimension witnesses, based on quantum random access codes, which are a function of the recorded statistics and that have different bounds for all possible decompositions of a high-dimensional physical system. Thus, it cert
Externí odkaz:
http://arxiv.org/abs/1710.04601
Autor:
Cañas, Gustavo, Acuña, Evelyn, Cariñe, Jaime, Barra, Johanna F., Gómez, Esteban S., Xavier, Guilherme B., Lima, Gustavo, Cabello, Adán
Publikováno v:
Phys. Rev. A 94, 012337 (2016)
We report a method that exploits a connection between quantum contextuality and graph theory to reveal any form of quantum contextuality in high-precision experiments. We use this technique to identify a graph which corresponds to an extreme form of
Externí odkaz:
http://arxiv.org/abs/1607.06633
Autor:
Gómez, Esteban S., Gómez, Santiago, González, Pablo, Cañas, Gustavo, Barra, Johanna F., Delgado, Aldo, Xavier, Guilherme B., Cabello, Adán, Kleinmann, Matthias, Vértesi, Tamás, Lima, Gustavo
Publikováno v:
Phys. Rev. Lett. 117, 260401 (2016)
Quantum measurements on a two-level system can have more than two independent outcomes, and in this case, the measurement cannot be projective. Measurements of this general type are essential to an operational approach to quantum theory, but so far,
Externí odkaz:
http://arxiv.org/abs/1604.01417