Self-testing is a method to infer the underlying physics of a quantum experiment in a black
box scenario. As such it represents the strongest form of certification for quantum systems. In …

The security of quantum key distribution (QKD) usually relies on that the users' devices are
well characterized according to the security models made in the security proofs. In contrast …

Bell-CHSH inequalities are trivial algebraic properties satisfied by each line of an Nx4
spreadsheet containing±1 entries, thus it is surprising that their violation in some …

Nonlocality was discovered by John Bell in 1964, in the context of the debates about
quantum theory, but is a phenomenon that can be studied in its own right. Its observation …

Contextuality is a feature of quantum correlations. It is crucial from a foundational
perspective as a non-classical phenomenon, and from an applied perspective as a resource …

Self-testing is a method of quantum state and measurement estimation that does not rely on
assumptions about the inner working of the devices used. Its experimental realization has …

We report on an optical setup generating more than one bit of randomness from one
entangled bit (ie, a maximally entangled state of two qubits). The amount of randomness is …

Contextuality and entanglement are valuable resources for quantum computing and
quantum information. Bell inequalities are used to certify entanglement; thus, it is important …

It is well known that observing nonlocal correlations allows us to draw conclusions about the
quantum systems under consideration. In some cases this yields a characterisation which is …

We present protocols for quantum key distribution in a prepare-and-measure setup with an
asymmetric level of trust. While the device of the sender (Alice) is partially characterized, the …