Measurement noise is a major source of noise in quantum metrology. Here, we explore preprocessing protocols that apply quantum controls to the quantum sensor state prior to the final noisy measurement (but after the unknown parameter has been imparted), aiming to maximize the estimation precision. We define the quantum preprocessing-optimized Fisher information, which determines the ultimate precision limit for quantum sensors under measurement noise, and conduct a thorough investigation into optimal preprocessing protocols. First, we formulate the preprocessing optimization problem as a biconvex optimization using the error observable formalism, based on which we prove that unitary controls are optimal for pure states and derive analytical...
This thesis addresses the problem of developing a quantum counter-part of the well established class...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
The impact of measurement imperfections on quantum metrology protocols has not been approached in a ...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
This thesis aims to help in bridging the gap between the ideals of theoretical quantum metrology and...
In quantum metrology, it is widely believed that the quantum Cramer-Rao bound is an attainable bound...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
We provide the optimal measurement strategy for a class of noisy channels that reduce to the identit...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
We consider a general model of unitary parameter estimation in the presence of Markovian noise, wher...
This thesis addresses the problem of developing a quantum counter-part of the well established class...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
The impact of measurement imperfections on quantum metrology protocols has not been approached in a ...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
International audienceControl of quantum systems is a central element of high-precision experiments ...
This thesis aims to help in bridging the gap between the ideals of theoretical quantum metrology and...
In quantum metrology, it is widely believed that the quantum Cramer-Rao bound is an attainable bound...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
We provide the optimal measurement strategy for a class of noisy channels that reduce to the identit...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
We consider a general model of unitary parameter estimation in the presence of Markovian noise, wher...
This thesis addresses the problem of developing a quantum counter-part of the well established class...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...
With an ever-expanding ecosystem of noisy and intermediate-scale quantum devices, exploring their po...