254 citations · 903 across the 45 of their papers we have counts for
10 papers · 1 filter
High-accuracy adaptive quantum tomography for high-dimensional quantum systems
L. Pereira, D. Martínez, G. Cañas +4
The accuracy of estimating -dimensional quantum states is limited by the Gill-Massar bound. It can be saturated in the qubit () scenario using adaptive standard quantum tom…
Boosting entanglement generation in down-conversion with incoherent illumination
Lucas Hutter, Gustavo Lima, Stephen P. Walborn
Entangled photons produced by spontaneous parametric down-conversion have been of paramount importance for our current understanding of quantum mechanics and advances in quantum in…
Experimental demonstration of phase estimation advantage in presence of depolarizing noise by using coherent measurements
R. S. Piera, S. P. Walborn, G. H. Aguilar
We report an experimental investigation of the role of measurement in quantum metrology when the states of the probes are mixed. In particular, we investigated optimized local meas…
Multi-dimensional entanglement generation with multi-core optical fibers
E. S. Gómez, S. Gómez, I. Machuca +4
Trends in photonic quantum information follow closely the technical progress in classical optics and telecommunications. In this regard, advances in multiplexing optical communicat…
Interferometric sensing of the tilt angle of a Gaussian beam
S. P. Walborn, G. H. Aguilar, P. L. Saldanha +2
We investigate interferometric techniques to estimate the deflection angle of an optical beam and compare them to the direct detection of the beam deflection. We show that quantum…
Quantum-optical Description of Phase Conjugation of Vector Vortex Beams in Stimulated Parametric Down Conversion
A. G. de Oliveira, N. Rubiano da Silva, R. Medeiros de Araújo +2
We present a quantum optics approach for describing stimulated parametric down conversion in the two type-I crystal "sandwich" configuration, which allows for parametric interactio…