512 citations · 769 across the 9 of their papers we have counts for
9 papers
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-Enhanced Sensing from Hyper-Entanglement
S. P. Walborn, A. H. Pimentel, L. Davidovich +1
Hyperentanglement --- simultaneous entanglement between multiple degrees of freedom of two or more systems --- has been used to enhance quantum information tasks such as quantum co…
Quantum speed limit for physical processes
M. M. Taddei, B. M. Escher, L. Davidovich +1
The evaluation of the minimal evolution time between two distinguishable states of a system is important for assessing the maximal speed of quantum computers and communication chan…
Quantum Metrological Limits via a Variational Approach
B. M. Escher, L. Davidovich, N. Zagury +1
The minimum achievable statistical uncertainty in the estimation of physical parameters is determined by the quantum Fisher information. Its computation for noisy systems is still…
Quantum computation with doped silicon cavities
M. Abanto, L. Davidovich, Belita Koiller +1
We propose a quantum computer architecture involving substitutional donors in photonic-crystal silicon cavities and the optical initialization, manipulation, and detection processe…
Single observable concurrence measurement without simultaneous copies
A. Salles, F. de Melo, J. C. Retamal +2
We present a protocol that allows us to obtain the concurrence of any two qubit pure state by performing a minimal and optimal tomography of one of the subsystems through measuring…