220 citations · 477 across the 6 of their papers we have counts for
6 papers
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…
Experimental investigation of enviroment--induced entanglement using an all--optical setup
M. H. M. Passos, W. F. Balthazar, A. Z. Khoury +3
We investigate the generation of entanglement between two non interacting qubits coupled to a common reservoir. An experimental setup was conceived to encode one qubit on the polar…
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…
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…
Scaling laws for the decay of multiqubit entanglement
L. Aolita, R. Chaves, D. Cavalcanti +2
We investigate the decay of entanglement of generalized N-particle Greenberger-Horne-Zeilinger (GHZ) states interacting with independent reservoirs. Scaling laws for the decay of e…
Environmental effects in the quantum-classical transition for the delta-kicked harmonic oscillator
A. R. R. Carvalho, R. L. de Matos Filho, L. Davidovich
We discuss the roles of the macroscopic limit and of different system-environment interactions in the quantum-classical transition for a chaotic system. We consider the kicked harm…