Publications (29)
Advantage of multi-partite entanglement for quantum cryptography over long and short ranged networks
Janka Memmen, Jens Eisert, Nathan Walk
The increasing sophistication of available quantum networks has seen a corresponding growth in the pursuit of multi-partite cryptographic protocols. Whilst the use of multi-partite…
Harnessing symmetry-protected topological order for quantum memories
Marcel Goihl, Nathan Walk, Jens Eisert +1
Spin chains with symmetry-protected edge modes are promising candidates to realize intrinsically robust physical qubits that can be used for the storage and processing of quantum i…
Measurement-Based Noiseless Linear Amplification for Quantum Communication
Helen M. Chrzanowski, Nathan Walk, Syed M. Assad +5
Entanglement distillation is an indispensable ingredient in extended quantum communication networks. Distillation protocols are necessarily non-deterministic and require advanced e…
Finite-size effects in continuous-variable QKD with Gaussian post-selection
Nedasadat Hosseinidehaj, Andrew M. Lance, Thomas Symul +2
In a continuous-variable quantum key distribution (CV-QKD) protocol, which is based on heterodyne detection at the receiver, the application of a noiseless linear amplifier (NLA) o…
Composably secure time-frequency quantum key distribution
Nathan Walk, Jonathan Barrett, Joshua Nunn
We present a composable security proof, valid against arbitrary attacks and including finite-size effects, for a high dimensional time-frequency quantum key distribution (TFQKD) pr…
Anonymous conference key agreement in linear quantum networks
Jarn de Jong, Frederik Hahn, Jens Eisert +2
Sharing multi-partite quantum entanglement between parties allows for diverse secure communication tasks to be performed. Among them, conference key agreement (CKA), an extension o…