Concerted efforts are underway to establish an infrastructure for a global quantum Internet to
realise a spectrum of quantum technologies. This will enable more precise sensors, secure …

Quantum key distribution (QKD) is a family of protocols for growing a private encryption key
between two parties. Despite much progress, all ground-based QKD approaches have a …

Quantum key distribution (QKD) promises unconditional security in data communication and
is currently being deployed in commercial applications. Nonetheless, before QKD can be …

The study of free-space quantum communications requires tools from quantum information
theory, optics, and turbulence theory. Here we combine these tools to bound the ultimate …

The recent launch of the Micius quantum-enabled satellite heralds a major step forward for
long-range quantum communication. Using single-photon discrete-variable quantum states …

Continuous variable (CV) quantum key distribution (QKD) provides a powerful setting for
secure quantum communications, thanks to the use of room-temperature off-the-shelf optical …

Establishing secure communication links at a global scale is a major potential application of
quantum information science but also extremely challenging for the underlying technology …

The free-space transfer of high-fidelity optical signals between remote locations has many
applications, including both classical and quantum communication, precision navigation …

The measurement of quantum signals that travel through long distances is fundamentally
and technologically interesting. We present quantum-limited coherent measurements of …

Global quantum communications will enable long-distance secure data transfer, networked
distributed quantum information processing, and other entanglement-enabled technologies …