Quantum Fisher information matrix (QFIM) is a core concept in theoretical quantum
metrology due to the significant importance of quantum Cramér–Rao bound in quantum …

In the context of a physical theory, two devices, A and B, described by the theory are called
incompatible if the theory does not allow the existence of a third device C that would have …

Recent years have witnessed a controversy over Heisenberg's famous error-disturbance
relation. Here the conflict is resolved by way of an analysis of the possible …

In parameter estimation, nuisance parameters refer to parameters that are not of interest but
nevertheless affect the precision of estimating other parameters of interest. For instance, the …

In the study of quantum limits to parameter estimation, the high dimensionality of the density
operator and that of the unknown parameters have long been two of the most difficult …

We derive a bound on the precision of state estimation for finite dimensional quantum
systems and prove its attainability in the generic case where the spectrum is non …

We experimentally test the error-disturbance uncertainty relation (EDR) in generalized,
strength-variable measurement of a single photon polarization qubit, making use of weak …

We investigate the performance of quantum Fisher information (QFI) under the Unruh-
Hawking effect, where one of the observers (eg, Rob) is uniformly accelerated with respect …

The uncertainty principle formulated by Heisenberg in 1927 describes a trade-off between
the error of a measurement of one observable and the disturbance caused on another …

Complementarity restricts the accuracy with which incompatible quantum observables can
be jointly measured. Despite popular conception, the Heisenberg uncertainty relation does …