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

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 …

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 …

Since its discovery, quantum entanglement has challenged some of the best established
views of the world: locality and reality. Quantum technologies promise to revolutionize …

The quest towards the integration of ultra-fast, high-precision optical clocks is reflected in the
large number of high-impact papers on the topic published in the last few years. This interest …

ABSTRACT Spontaneous Parametric Down-Conversion (SPDC), also known as parametric
fluorescence, parametric noise, parametric scattering and all various combinations of the …

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 …

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 …

Multi-level (qudit) entangled photon states are a key resource for both fundamental physics
and advanced applied science, as they can significantly boost the capabilities of novel …

Quantum cryptography Page 1 Quantum cryptography Nicolas Gisin, Grégoire Ribordy,
Wolfgang Tittel, and Hugo Zbinden Group of Applied Physics, University of Geneva, 1211 …