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pro vyhledávání: '"Almeida G"'
The Bi1-xSbx was the first 3D topological insulator found in nature. It presents a complex electronic structure with topological to trivial transition and a semimetallic to semiconductor transition, both achieved by changing the x fraction of Sb. The
Externí odkaz:
http://arxiv.org/abs/2409.17444
Autor:
Dors, O. L., Almeida, G. C., Oliveira, C. B., Flury, S. R., Riffel, R., Riffel, R. A., Cardaci, M. V., Hägele, G. F., Ilha, G. S., Krabbe, A. C., Arellano-Córdova, K. Z., Santos, P. C., Morais, I. N.
For the first time, a calibration between the HeI $\lambda5876$/H$\beta$ emission line ratio and the helium abundance $y$=12+log(He/H) for Narrow line regions (NLRs) of Seyfert~2 Active Galactic Nuclei (AGN) is proposed. In this context, observationa
Externí odkaz:
http://arxiv.org/abs/2406.03259
Autor:
Dors, O. L., Cardaci, M. V., Hägele, G. F., Valerdi, M., Ilha, G. S., Oliveira, C. B., Riffel, R. A., Flury, S. R., Arellano-Córdova, K. Z., Storchi-Bergmann, T., Riffel, R., Almeida, G. C., Morais, I. N.
We derive the nitrogen and oxygen abundances in the Narrow Line Regions (NLRs) of a sample of 38 local ($z \: < \: 0.4$) Seyfert~2 nuclei. For that, we consider narrow optical emission line intensities and direct estimates of the electron temperature
Externí odkaz:
http://arxiv.org/abs/2405.13906
Publikováno v:
Phys. Rev. A 108, 022407 (2023)
We show that a qubit transfer protocol can be realized through a flat band hosted by a disordered $XX$ spin-1/2 diamond chain. In the absence of disorder, the transmission becomes impossible due to the compact localized states forming the flat band.
Externí odkaz:
http://arxiv.org/abs/2307.15360
Publikováno v:
Phys. Rev. A 108, 023520 (2023)
The dynamics of two interacting quantum particles on a weakly disordered chain is investigated. Spatial quantum interference between them is characterized through the statistics of two-particle transition amplitudes, related to Hanbury Brown-Twiss co
Externí odkaz:
http://arxiv.org/abs/2305.01729
We investigate the outbreak of anomalous quantum wavefunction amplitudes in a one-dimensional tight-binding lattice featuring correlated diagonal disorder. Such rogue-wave-like behavior is fostered by a competition between localization and mobility.
Externí odkaz:
http://arxiv.org/abs/2208.00538
Autor:
Falcão, P. R. N., Mendonça, J. P., Buarque, A. R. C., Dias, W. S., Almeida, G. M. A., Lyra, M. L.
The dynamics of a three-state quantum walk with amplitude-dependent phase shifts is investigated. We consider two representative inputs whose linear evolution is known to display either full dispersion of the wave packet or intrinsic localization on
Externí odkaz:
http://arxiv.org/abs/2207.03953
Publikováno v:
Brazilian Journal of Biology, Vol 62, Iss 2, Pp 263-268 (2002)
Five species of anuran amphibians, all belonging to the family Hylidae, were collected at Praia das Neves, municipality of Presidente Kennedy, southeastern Brazil,. The species were represented by four genera: Scinax, Hyla, Aparasphenodon, and Trachy
Externí odkaz:
https://doaj.org/article/0a60d38122e746c49f7d0e010443c207
Rogue waves are rapid and unpredictable events of exceptional amplitude reported in various fields, such as oceanography and optics, with much of the interest being targeted towards their physical origins and likelihood of occurrence. Here, we use th
Externí odkaz:
http://arxiv.org/abs/2204.00060
We perform a finite-time scaling analysis over the detrapping point of a three-state quantum walk on the line. The coin operator is parameterized by $\rho$ that controls the wavepacket spreading velocity. The input state prepared at the origin is set
Externí odkaz:
http://arxiv.org/abs/2108.10275