We introduce a notion of contextuality for transformations in sequential contexts, distinct from
the Bell-Kochen-Specker and Spekkens notions of contextuality. Within a transformation …

Multi-party quantum summation is the premise for implementing other complex multi-party
quantum computing tasks. Here, a hybrid protocol is proposed to simultaneously implement …

We show the security of multi-user key establishment on a single line of quantum
communication. More precisely, we consider a quantum communication architecture where …

Universal blind quantum computing allows users with minimal quantum resources to
delegate a quantum computation to a remote quantum server, while keeping intrinsically …

Random access codes have provided many examples of quantum advantage in
communication, but concern only one kind of information retrieval task. We introduce a …

We introduce a simple single-system game inspired by the Clauser-Horne-Shimony-Holt
(CHSH) game. For qubit systems subjected to unitary gates and projective measurements …

Due to its fundamental principles, quantum theory holds the promise to enhance the security
of modern cryptography, from message encryption to anonymous communication, digital …

Several classes of quantum circuits have been shown to provide a quantum computational
advantage under certain assumptions. The study of ever more restricted classes of quantum …

Quantum correlations are central to the foundations of quantum physics and form the basis
of quantum technologies. Here, our goal is to connect quantum correlations and …

Quantum information networks can transmit quantum states and perform quantum
operations between different quantum network nodes, which are essential for various …