Quantum theory has been successfully validated in numerous laboratory experiments. But
would such a theory, which effectively describes the behavior of microscopic physical …

Quantum cryptography is arguably the fastest growing area in quantum information science.
Novel theoretical protocols are designed on a regular basis, security proofs are constantly …

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 …

In the past, long-distance free-space quantum communication experiments could only be
implemented at night. During the daytime, the bright background sunlight prohibits quantum …

Quantum key distribution has reached the level of maturity required for deployment in real-
world scenarios,,,–. It has previously been shown to operate alongside classical …

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 …

With the ever-increasing demand for data and the radio frequency spectrum becoming
congested, free space optics (FSO) may find a niche for situations where fiber is too …

The recent rapid growth of satellite-constellation programmes for remote sensing and
communications, enabled by the availability of small-sized and low-cost satellites, has …

Global quantum networks for secure communication can be realized using large fleets of
satellites distributing entangled photon pairs between ground-based nodes. Because the …

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 …