Quantum parameter estimation promises a high-precision measurement in theory; however,
how to design the optimal scheme in a specific scenario, especially under a practical …

The use of correlated states and measurements promises improvements in the accuracy of
frequency metrology and the stability of atomic clocks. However, develo** strategies …

We show that multipartite quantum states that have a positive partial transpose with respect
to all bipartitions of the particles can outperform separable states in linear interferometers …

We develop an efficient algorithm for determining optimal adaptive quantum estimation
protocols with arbitrary quantum control operations between subsequent uses of a probed …

Identification of the optimal quantum metrological protocols in realistic many particle
quantum models is in general a challenge that cannot be efficiently addressed by the state …

We introduce a semidefinite programming algorithm to find the minimal quantum Fisher
information compatible with an arbitrary dataset of mean values. This certification task allows …

Quantum metrology and sensing seek advantages in estimating an unknown parameter of
some quantum state or channel, using entanglement such as spin squeezing produced by …

We consider bipartite entangled states that cannot outperform separable states in any linear
interferometer. Then, we show that these states can still be more useful metrologically than …

Detection of very weak forces and precise measurement of time are two of the many
applications of quantum metrology to science and technology. To sense an unknown …

Bipartite entangled quantum states with a positive partial transpose (PPT), ie, PPT entangled
states, are usually considered very weakly entangled. Since no pure entanglement can be …