57 citations · 179 across the 9 of their papers we have counts for
9 papers
Indefinite causal order for quantum phase estimation with Pauli noise
Francois Chapeau-Blondeau
This letter further explores the recent scheme of switched quantum channels with indefinite causal order applied to the reference metrological task of quantum phase estimation in t…
Modeling and simulation of a quantum thermal noise on the qubit
Francois Chapeau-Blondeau
Quantum noise or decoherence is a major factor impacting the performance of quantum technologies. On the qubit, an important quantum noise, often relevant in practice, is the therm…
Indefinite causal order for quantum metrology with quantum thermal noise
Francois Chapeau-Blondeau
A switched quantum channel with indefinite causal order is studied for the fundamental metrological task of phase estimation on a qubit unitary operator affected by quantum thermal…
Quantum parameter estimation on coherently superposed noisy channels
Francois Chapeau-Blondeau
A generic qubit unitary operator affected by quantum noise is duplicated and inserted in a coherently superposed channel, superposing two paths offered to a probe qubit across the…
Noisy quantum metrology with the assistance of indefinite causal order
Francois Chapeau-Blondeau
A generic qubit unitary operator affected by depolarizing noise is duplicated and inserted in a quantum switch process realizing a superposition of causal orders. The characterizat…
Optimized entanglement for quantum parameter estimation from noisy qubits
Francois Chapeau-Blondeau
For parameter estimation from an -component composite quantum system, it is known that a separable preparation leads to a mean-squared estimation error scaling as while an…
Too good to be true: when overwhelming evidence fails to convince
Lachlan J. Gunn, François Chapeau-Blondeau, Mark McDonnell +3
Is it possible for a large sequence of measurements or observations, which support a hypothesis, to counterintuitively decrease our confidence? Can unanimous support be too good to…
Fisher information as a performance metric for locally optimum processing
Fabing Duan, Francois Chapeau-Blondeau, Derek Abbott
For a known weak signal in additive white noise, the asymptotic performance of a locally optimum processor (LOP) is shown to be given by the Fisher information (FI) of a standardiz…
Noise improvement of SNR gain in parallel array of bistable dynamic systems by array stochastic resonance
Fabing Duan, Francois Chapeau-Blondeau, Derek Abbott
We report the regions where a signal-to-noise ratio (SNR) gain exceeding unity exists in a parallel uncoupled array of identical bistable systems, for both subthreshold and suprath…