The problem of estimating an unknown phase ϕ using two-level probes in the presence of unital phase-covariant noise and using finite resources is investigated. We introduce a simple model in which the phase-imprinting operation on the probes is realized by a unitary transformation with a randomly sampled generator. We determine the optimal phase sensitivity in a sequential estimation protocol and derive a general (tight-fitting) lower bound. The sensitivity grows quadratically with the number of applications N of the phase-imprinting operation, then attains a maximum at some Nopt, and eventually decays to zero. We provide an estimate of Nopt in terms of accessible geometric properties of the noise and illustrate its usefulness as a guidelin...
In recent years, several estimation strategies have been formulated to determine the value of an unk...
Optical sensors based on quantum light need to work even in the presence of imperfections. Here we d...
We consider the role of detection noise in quantum-enhanced metrology in collective spin systems and...
This is the final version. Available from American Physical Society via the DOI in this recordThe pr...
Quantum metrology aims to exploit quantum phenomena to overcome classical limitations in the estimat...
This thesis aims to help in bridging the gap between the ideals of theoretical quantum metrology and...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
The problem of estimating the frequency of a two-level atom in a noisy environment is studied. Our i...
In this paper we explore the possibility of performing Heisenberg limited quantum metrology of a pha...
Quantum metrology is a vividly developing topic of current research in both theoretical and experime...
Parameter estimation is of fundamental importance in areas from atomic spectroscopy and atomic clock...
This thesis explores various protocols which can be applied to quantum metrology, such that precisio...
We address the use of entangled qubits as quantum probes to characterize the noise induced by comple...
We consider frequency estimation in a noisy environment with noisy probes. This builds on previous s...
We introduce the notion of fault-tolerant quantum metrology to overcome noise beyond our control, as...
In recent years, several estimation strategies have been formulated to determine the value of an unk...
Optical sensors based on quantum light need to work even in the presence of imperfections. Here we d...
We consider the role of detection noise in quantum-enhanced metrology in collective spin systems and...
This is the final version. Available from American Physical Society via the DOI in this recordThe pr...
Quantum metrology aims to exploit quantum phenomena to overcome classical limitations in the estimat...
This thesis aims to help in bridging the gap between the ideals of theoretical quantum metrology and...
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum met...
The problem of estimating the frequency of a two-level atom in a noisy environment is studied. Our i...
In this paper we explore the possibility of performing Heisenberg limited quantum metrology of a pha...
Quantum metrology is a vividly developing topic of current research in both theoretical and experime...
Parameter estimation is of fundamental importance in areas from atomic spectroscopy and atomic clock...
This thesis explores various protocols which can be applied to quantum metrology, such that precisio...
We address the use of entangled qubits as quantum probes to characterize the noise induced by comple...
We consider frequency estimation in a noisy environment with noisy probes. This builds on previous s...
We introduce the notion of fault-tolerant quantum metrology to overcome noise beyond our control, as...
In recent years, several estimation strategies have been formulated to determine the value of an unk...
Optical sensors based on quantum light need to work even in the presence of imperfections. Here we d...
We consider the role of detection noise in quantum-enhanced metrology in collective spin systems and...