BACKGROUND The internet has had a revolutionary impact on our world. The vision of a
quantum internet is to provide fundamentally new internet technology by enabling quantum …

Quantum technologies exploit entanglement to revolutionize computing, measurements, and
communications. This has stimulated the research in different areas of physics to engineer …

The distribution of entangled states across the nodes of a future quantum internet will unlock
fundamentally new technologies. Here, we report on the realization of a three-node …

More than 50 years ago, John Bell proved that no theory of nature that obeys locality and
realism can reproduce all the predictions of quantum theory: in any local-realist theory, the …

Local realism is the worldview in which physical properties of objects exist independently of
measurement and where physical influences cannot travel faster than the speed of light …

In the context of quantum technologies, the generation and manipulation of single photons
has become a key element for applications such as quantum communication and quantum …

Device-independent quantum key distribution (DIQKD) enables the generation of secret
keys over an untrusted channel using uncharacterized and potentially untrusted devices …

Bell's 1964 theorem, which states that the predictions of quantum theory cannot be
accounted for by any local theory, represents one of the most profound developments in the …

Quantum networks promise to provide the infrastructure for many disruptive applications,
such as efficient long-distance quantum communication and distributed quantum …

With the ability to transfer and process quantum information, large-scale quantum networks
will enable a suite of fundamentally new applications, from quantum communications to …