This review aims at gathering the most relevant quantum multi-parameter estimation
methods that go beyond the direct use of the quantum Fisher information concept. We …

Recently, there has been much interest in a new kind of “unspeakable” quantum information
that stands to regular quantum information in the same way that a direction in space or a …

It is a fundamental problem to decide how many copies of an unknown mixed quantum state
are necessary and sufficient to determine the state. This is the quantum analogue of the …

The estimation of multiple parameters in quantum metrology is important for a vast array of
applications in quantum information processing. However, the unattainability of fundamental …

Measurement and estimation of parameters are essential for science and engineering,
where the main quest is to find the highest achievable precision with the given resources …

The efficient and reliable certification of quantum states is essential for various quantum
information processing tasks as well as for the general progress on the implementation of …

The precise measurement of a magnetic field is one of the most fundamental and important
tasks in quantum metrology. Although extensive studies on quantum magnetometry have …

Optimal generalized measurements for state estimation are well understood. However,
practical quantum state tomography is typically performed using a fixed set of projective …

We consider the classical correlations that two observers can extract by measurements on a
bipartite quantum state and we discuss how they are related to the quantum mutual …

We analyze mean fidelity between random density matrices of size N, generated with
respect to various probability measures in the space of mixed quantum states: the Hilbert …