Continuous-variable quantum key distribution (CV QKD) protocols with discrete modulation
are interesting due to their experimental simplicity and their great potential for massive …

Quantum channels enable the implementation of communication tasks inaccessible to their
classical counterparts. The most famous example is the distribution of secret key. However …

In this work, we present a reliable, efficient, and tight numerical method for calculating key
rates for finite-dimensional quantum key distribution (QKD) protocols. We illustrate our …

The postselection technique is an important proof technique for proving the security of
quantum key distribution protocols against coherent attacks via the uplift of any security …

We present an efficient method to extract the amount of true randomness that can be
obtained by a quantum random number generator (QRNG). By repeating the measurements …

An on-demand source of bright entangled photon pairs is desirable for quantum key
distribution (QKD) and quantum repeaters. The leading candidate to generate such pairs is …

We develop a method to connect the infinite-dimensional description of optical continuous-
variable quantum key distribution (QKD) protocols to a finite-dimensional formulation. The …

In free-space quantum key distribution (QKD), the sensitivity of the receiver's detector
channels may depend differently on the spatial mode of incoming photons. Consequently …

Quantum key distribution (QKD) allows the generation of cryptographic keys beyond the
computational hardness paradigm and is befitting for secure data transmission requiring …

Quantum key distribution allows for the generation of a secret key between distant parties
connected by a quantum channel such as optical fibre or free space. Unfortunately, the rate …