932 citations · 1.5k across the 18 of their papers we have counts for
18 papers
Quantum distinguishability measures: projectors vs. states maximization
Adrian A. Budini, Ruynet L. de Matos Filho, Marcelo F. Santos
The distinguishability between two quantum states can be defined in terms of their trace distance. The operational meaning of this definition involves a maximization over measureme…
Usefulness of Quantum Entanglement for Enhancing Precision in Frequency Estimation
Marco A. Rodríguez-García, Ruynet L. de Matos Filho, Pablo Barberis-Blostein
We investigate strategies for reaching the ultimate limit on the precision of frequency estimation when the number of probes used in each run of the experiment is fixed. That limit…
Quantum advantage of time-reversed ancilla-based metrology of absorption parameters
Jiaxuan Wang, Ruynet. L. de Matos Filho, Girish S. Agarwal +1
Quantum estimation of parameters defining open-system dynamics may be enhanced by using ancillas that are entangled with the probe but are not submitted to the dynamics. Here we co…
Robust interferometric sensing using two-photon interference
G. H. Aguilar, R. S. Piera, P. L. Saldanha +2
Precise measurement of the angular deviation of an object is a common task in science and technology. Many methods use light for this purpose. Some of these exploit interference ef…
Attainability of the quantum information bound in pure state models
Fabricio Toscano, Wellison P. Bastos, Ruynet L. de Matos Filho
The attainability of the quantum Cramér-Rao bound [QCR], the ultimate limit in the precision of the estimation of a physical parameter, requires the saturation of the quantum infor…
Achieving metrological precision limits through post-selection
G. Bié Alves, A. Pimentel, M. Hor-Meyll +3
Post-selection strategies have been proposed with the aim of amplifying weak signals, which may help to overcome detection thresholds associated with technical noise in high-precis…
Weak-value amplification as an optimal metrological protocol
G. Bié Alves, B. M. Escher, R. L. de Matos Filho +2
The implementation of weak-value amplification requires the pre- and post-selection of states of a quantum system, followed by the observation of the response of the meter, which i…
Quantum limit for measurement of a weak classical force coupled to a noisy quantum-mechanical oscillator
C. L. Latune, B. M. Escher, R. L. de Matos Filho +1
Precise measurements of tiny forces and displacements play an important role in science and technology. The precision of recent experiments, while beginning to reach the limits imp…
General framework for estimating the ultimate precision limit in noisy quantum-enhanced metrology
B. M. Escher, R. L. de Matos Filho, L. Davidovich
The estimation of parameters characterizing dynamical processes is central to science and technology. The estimation error changes with the number N of resources employed in the ex…
Optimal teleportation with a noisy source
Bruno G. Taketani, Fernando de Melo, Ruynet L. de Matos Filho
We establish the optimal quantum teleportation protocol for the realistic scenario when both input state and quantum channel are afflicted by noise. In taking these effects into ac…
Entropic Entanglement Criteria for Continuous Variables
S. P. Walborn, B. G. Taketani, A. Salles +2
We derive several entanglement criteria for bipartite continuous variable quantum systems based on the Shannon entropy. These criteria are more sensitive than those involving only…
Entangled coherent states and squeezing in N trapped ions
E. Solano, R. L. de Matos Filho, N. Zagury
We consider a resonant bichromatic excitation of N trapped ions that generates displacement and squeezing in their collective motion conditioned to their ionic internal state, prod…
Conditional large Fock state preparation and field state reconstruction in Cavity QED
M. Franca Santos, E. Solano, R. L. de Matos Filho
We propose a scheme for producing large Fock states in Cavity QED via the implementation of a highly selective atom-field interaction. It is based on Raman excitation of a three-le…
Mesoscopic superpositions of vibronic collective states of N trapped ions
E. Solano, R. L. de Matos Filho, N. Zagury
We propose a scalable procedure to generate entangled superpositions of motional coherent states and electronic states in N trapped ions. Beyond their fundamental importance, these…
Manipulating motional states by selective vibronic interaction in two trapped ions
E. Solano, P. Milman, R. L. de Matos Filho +1
We present a selective vibronic interaction for manipulating motional states in two trapped ions, acting resonantly on a previously chosen vibronic subspace and dispersively on all…
Deterministic Bell states and measurement of the motional state of two trapped ions
E. Solano, R. L. de Matos Filho, N. Zagury
We present a method for the deterministic generation of all the electronic Bell states of two trapped ions. It involves the combination of a purely dispersive with a resonant laser…
Reliable teleportation in trapped ions
E. Solano, C. L. Cesar, R. L. de Matos Filho +1
We study a method for the implementation of a reliable teleportation protocol (theoretically, 100% of success) of internal states in trapped ions. The generation of the quantum cha…
Determination of entangled quantum states of a trapped atom
S. Wallentowitz, R. L. de Matos Filho, W. Vogel
We propose a method for measuring entangled vibronic quantum states of a trapped atom. It is based on the nonlinear dynamics of the system that appears by resonantly driving a weak…