317 citations
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5 papers · 1 filter
Thermal entanglement witness for materials with variable local spin lengths
Andre M. C. Souza, Francisco A. G. Almeida
We show that the thermal entanglement in a spin system using only magnetic susceptibility measurements is restricted to the insulator materials. We develop a generalization of the…
Tunable anisotropic nonlinearity in superconductors with asymmetric antidot array
A. Yu. Aladyshkin, J. Van de Vondel, C. C. de Souza Silva +1
The influence of the spatial asymmetry of the pinning potential on the spectral composition of the voltage, induced in perforated superconducting Al bridges by the injection of a s…
A Standalone Markerless 3D Tracker for Handheld Augmented Reality
Joao Paulo Lima, Veronica Teichrieb, Judith Kelner
This paper presents an implementation of a markerless tracking technique targeted to the Windows Mobile Pocket PC platform. The primary aim of this work is to allow the development…
Vortex-Antivortex annihilation dynamics in a square mesoscopic superconducting cylinder
Edson Sardella, Paulo Noronha Lisboa Filho, Clécio C. de Souza Silva +2
The dynamics of the annihilation of a vortex-antivortex pair is investigated. The pair is activated magnetically during the run of a simulated hysteresis loop on a square mesoscopi…
Collapses and revivals of stored orbital angular momentum of light in a cold atomic ensemble
D. Moretti, D. Felinto, J. W. R. Tabosa
We report on the storage of orbital angular momentum of light in a cold ensemble of cesium atoms. We employ Bragg diffraction to retrieve the stored optical information impressed i…