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 …

Quantum communications promises reliable transmission of quantum information, efficient
distribution of entanglement and generation of completely secure keys. For all these tasks …

In quantum mechanics, a fundamental law prevents quantum communications to
simultaneously achieve high rates and long distances. This limitation is well known for point …

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

We review recent results on the simulation of quantum channels, the reduction of adaptive
protocols (teleportation stretching), and the derivation of converse bounds for quantum and …

This paper establishes several converse bounds on the private transmission capabilities of a
quantum channel. The main conceptual development builds firmly on the notion of a private …

We consider the distribution of secret keys, both in a bipartite and a multipartite (conference)
setting, via a quantum network and establish a framework to obtain bounds on the …

We investigate the maximum rates for transmitting quantum information, distilling
entanglement, and distributing secret keys between a sender and a receiver in a multipoint …

The generalized amplitude-damping channel (GADC) is one of the sources of noise in
superconducting-circuit-based quantum computing. It can be viewed as the qubit analog of …

The quantum internet holds promise for achieving quantum communication—such as
quantum teleportation and quantum key distribution (QKD)—freely between any clients all …