Quantum key distribution (QKD) offers future proof security based on fundamental laws of
physics. Long-distance QKD spanning regions such as the United Kingdom (UK) may …

Thermal radiation played a pivotal role in the preliminary development of quantum physics
where it helped resolve the apparent incongruity of the ultraviolet catastrophe. In …

Single-photon avalanche detectors (SPADs) are crucial sensors of light for many fields and
applications. However, they are not able to resolve photon number, so typically more …

The analysis of link loss is one of the first and most important steps for the design of an
optical communication system. This is particularly vital in quantum communications systems …

Propagation losses in transmission media limit the transmission distance of optical signals.
In the case where the signal is made up of quantum optical states, conventional …

Ghost imaging research has demonstrated that it is possible to reproduce an image of an
object that has not interacted with the imaging light. In this paper we describe theoretically …

Single-photon avalanche detectors (SPADs) are used ubiquitously in optical and quantum
science, but they are not photon-number-resolving detectors. Despite this, in this work we …

We propose a postselecting parity-swap amplifier for Schrödinger cat states that does not
require the amplified state to be known a priori. The device is based on a previously …

We describe a technique whereby a coherent amplitude can be imprinted nonlocally on to a
beam of light with thermal statistics that has no phase information on average. We have …