Measurements with randomly chosen settings determine many important properties of
quantum states without the need for a shared reference frame or calibration. They naturally …

The existence of correlations between the parts of a quantum system on the one hand, and
entanglement between them on the other, are different properties. Yet, one intuitively would …

Correlations in multiparticle systems are constrained by restrictions from quantum
mechanics. A prominent example for these restrictions are monogamy relations, limiting the …

We derive conditions in the form of inequalities to detect the genuine N-partite entanglement
of N systems. The inequalities are expressed in terms of variances of spin operators and can …

Genuinely entangled subspaces (GESs) are the class of completely entangled subspaces
that contain only genuinely multiparty entangled states. They constitute a particularly useful …

$\textit {Entangled quantum systems are more strongly correlated than classical systems can
be.} $ This simplified statement proves to be remarkably rich by raising several questions …

The aim of this thesis is to deepen the understanding of correlations between particles in
quantum mechanical systems. It focuses on finding relationships between the correlations …

With limited control over quantum systems, how can we extract information about them and
characterize their properties? This thesis addresses this question from several perspectives …

We investigate the maximum purity that can be achieved by k-uniform mixed states of N
parties. Such N-party states have the property that all their k-party reduced states are …

In this paper, we study the influence of nonabelian superselection rules on the transfer of
quantum information with the help of qubits on the base of an algebraic model and formulate …