Quantum conference key agreement (QCKA) allows multiple users to establish a secure key
from a shared multi-partite entangled state. In a quantum network, this protocol can be …

The violation of a Bell inequality is the paradigmatic example of device-independent
quantum information: The nonclassicality of the data is certified without the knowledge of the …

Bell nonlocality is the key quantum resource in some device-independent quantum
information processing. It is of great importance to study the efficient sharing of this resource …

We present the variational separability verifier (VSV), which is a variational quantum
algorithm that determines the closest separable state (CSS) of an arbitrary quantum state …

Entanglement is known to boost the efficiency of classical communication. In distributed
computation, for instance, exploiting entanglement can reduce the number of communicated …

Entangled photon pairs are an important resource for many types of quantum protocols.
Semiconductor Bragg-reflection waveguides are a promising photon-pair source due to …

Mutually entangled multi-photon states are at the heart of all-optical quantum technologies.
While impressive progresses have been reported in the generation of such quantum light …

Steady technological advances and recent milestones such as intercontinental quantum
communication and the first implementation of medium-scale quantum networks are paving …

Non-locality is not only one of the most prominent quantum features but can also serve as a
resource for various information-theoretical tasks. Analysing it from an information …

As a way of saving quantum resources, recycling of Bell nonlocality has been experimentally
studied, but restricted to sequential unsharp measurements. However, it has been …