Semidefinite programs are convex optimisation problems involving a linear objective
function and a domain of positive semidefinite matrices. Over the last two decades, they …

Whether positive operator-valued measures (POVMs) provide advantages in demonstrating
Bell nonlocality has remained unknown, even in the simple scenario of Einstein-Podolsky …

We consider general prepare-and-measure scenarios in which Alice can transmit qubit
states to Bob, who can perform general measurements in the form of positive operator …

We study quantum steering experiments without assuming that the trusted party can
perfectly control their measurement device. Instead, we introduce a scenario in which these …

Unsharp measurements are widely seen as the key resource for recycling the nonlocality of
an entangled state shared between several sequential observers. Contrasting this, we here …

This work compares the performance of single-and two-qubit probes for estimating several
phase rotations simultaneously under the action of different noisy channels. We compute the …

We formulate a new conceptual approach for one-shot complete polarization state
measurement with nanostructured metasurfaces applicable to classical light and …

Semi-device-independent (SDI) methods offer a credible way to calibrate preparation and
measurement devices simultaneously in quantum information processing, using only prior …

With the advent of quantum technology, the interest in communication tasks assisted by
quantum systems has increased both in academia and industry. Nonetheless, the …

Shared entanglement boosts classical correlations between systems that interact over a
limited quantum channel. To create such correlations, a natural avenue is to use …