BACKGROUND The past two decades have seen intense efforts aimed at building quantum
computing hardware with the potential to solve problems that are intractable on classical …

Spins of impurities in solids provide a unique architecture to realize quantum technologies.
A quantum register of electron and nearby nuclear spins in the lattice encompasses high …

Quantum communication brings radically new capabilities that are provably impossible to
attain in any classical network. Here, we take the first step from a physics experiment to a …

The nitrogen-vacancy (NV) center in diamond has an optically addressable, highly coherent
spin. However, a NV center even in high-quality single-crystalline material is a very poor …

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

The silicon-vacancy center in diamond offers attractive opportunities in quantum photonics
due to its favorable optical properties and optically addressable electronic spin. Here, we …

We present a stack model for breaking down the complexity of entanglement-based
quantum networks. More specifically, we focus on the structures and architectures of …

We report on the conversion to telecommunication wavelengths of single photons emitted by
a nitrogen-vacancy (NV) defect in diamond. By means of difference frequency generation …

We study the performance (rate and fidelity) of distributing multipartite entangled states in a
quantum network through the use of a central node. Specifically, we consider the scenario …

Long-distance quantum communication will require the use of quantum repeaters to
overcome the exponential attenuation of signal with distance. One class of such repeaters …