Zobrazeno 1 - 10
of 291
pro vyhledávání: '"Nogueira, W."'
Estimating the number of states of a quantum system via the rodeo algorithm for quantum computation.
Publikováno v:
Quantum Information Processing; Oct2024, Vol. 23 Issue 10, p1-18, 18p
Akademický článek
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Publikováno v:
Physical Review A 91, 013801 (2015)
Due to practical reasons, experimental and theoretical continuous-variable (CV) quantum information (QI) has been heavily based on Gaussian states. Nevertheless, many CV-QI protocols require the use of non-Gaussian states and operations. Here, we sho
Externí odkaz:
http://arxiv.org/abs/1501.02403
Autor:
Gonzalez, P., Rebon, L., da Silva, T. Ferreira, Figueroa, M., Saavedra, C., Curty, M., Lima, G., Xavier, G. B., Nogueira, W. A. T.
Publikováno v:
Phys. Rev. A 92, 022337 (2015)
Side-channel attacks currently constitute the main challenge for quantum key distribution (QKD) to bridge theory with practice. So far two main approaches have been introduced to address this problem, (full) device-independent QKD and measurement-dev
Externí odkaz:
http://arxiv.org/abs/1410.1422
Autor:
Etcheverry, S., Cañas, G., Gómez, E. S., Nogueira, W. A. T., Saavedra, C., Xavier, G. B., Lima, G.
Publikováno v:
Sci. Rep. 3, 2316 (2013)
The secure transfer of information is an important problem in modern telecommunications. Quantum key distribution (QKD) provides a solution to this problem by using individual quantum systems to generate correlated bits between remote parties, that c
Externí odkaz:
http://arxiv.org/abs/1308.0019
Autor:
Cuevas, A., Carvacho, G., Saavedra, G., Cariñe, J., Nogueira, W. A. T., Figueroa, M., Cabello, A., Mataloni, P., Lima, G., Xavier, G. B.
Publikováno v:
Nat. Commun. 4, 2871 (2013)
Any practical realization of entanglement-based quantum communication must be intrinsically secure and able to span long distances avoiding the need of a straight line between the communicating parties. The violation of Bell's inequality offers a met
Externí odkaz:
http://arxiv.org/abs/1306.6641
Publikováno v:
Physical Review A 86, 042114 (2012)
Recently, V\'{e}rtesi and Bene [Phys. Rev. A. {\bf 82}, 062115 (2010)] derived a two-qubit Bell inequality, $I_{CH3}$, which they show to be maximally violated only when more general positive operator valued measures (POVMs) are used instead of the u
Externí odkaz:
http://arxiv.org/abs/1207.0712
The theoretical approach to describe the defocusing microscopy technique by U. Agero et al. [Phys. Rev. E {\bf 67}, 051904 (2003)] assumes that the size of the objective lens aperture is infinite. This treatment gives that the intensity at the image
Externí odkaz:
http://arxiv.org/abs/1201.0649
Publikováno v:
Optics Express Vol. 20, Issue 4, pp. 3753-3772 (2012)
The state of the spatially correlated down-converted photons is usually treated as a two-mode Gaussian entangled state. While intuitively this seems to be reasonable, it is known that new structures in the spatial distributions of these photons can b
Externí odkaz:
http://arxiv.org/abs/1111.4006
Autor:
Nogueira, W. A. T., Santibañez, M., Pádua, S., Delgado, A., Saavedra, C., Neves, L., Lima, G.
In this work we generate two-photon hybrid entangled states (HES), where the polarization of one photon is entangled with the transverse spatial degree of freedom of the second photon. The photon pair is created by parametric down-conversion in a pol
Externí odkaz:
http://arxiv.org/abs/1009.4208