One of the best signatures of nonclassicality in a quantum system is the existence of
correlations that have no classical counterpart. Different methods for quantifying the …

It was recently suggested that causal structures are both dynamical, because of general
relativity, and indefinite, because of quantum theory. The process matrix formalism furnishes …

In the quantum regime, the third law of thermodynamics implies the unattainability of pure
states. As shown recently, such unattainability implies that a unitary interaction between the …

Simulating quantum physical processes has been one of the major motivations for quantum
information science. Quantum channels, which are completely positive and trace preserving …

Adiabatic measurements, followed by feedback and erasure protocols, have often been
considered as a model to embody Maxwell's Demon paradox and to study the interplay …

Quantum simulation is one of the central discipline to demonstrate the power of quantum
computing. In recent years, the theoretical framework of quantum superchannels has been …

Let K be a convex subset of the state space of a finite-dimensional C*-algebra. We study the
properties of channels on K, which are defined as affine maps from K into the state space of …

The structure of completely positive quantum instruments is analyzed thoroughly. We
characterize the extreme points of the convex set of instruments. The characterization holds …

Studying sequential measurements is of the utmost importance to both the foundational
aspects of quantum theory and the practical implementations of quantum technologies, with …

For any quantum observable (positive operator valued measure (POVM)), we show that its
compatible quantum instruments can be identified with certain channels and can be seen as …