78 citations · 272 across the 7 of their papers we have counts for
7 papers · 1 filter
Security of discrete-modulated continuous-variable quantum key distribution
Stefan Bäuml, Carlos Pascual-García, Victoria Wright +2
Continuous variable quantum key distribution with discrete modulation has the potential to provide information-theoretic security using widely available optical elements and existi…
Universal Limitations on Quantum Key Distribution over a Network
Siddhartha Das, Stefan Bäuml, Marek Winczewski +1
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 ac…
Linear programs for entanglement and key distribution in the quantum internet
Stefan Bäuml, Koji Azuma, Go Kato +1
Quantum networks will allow to implement communication tasks beyond the reach of their classical counterparts. A pressing and necessary issue for the design of quantum network prot…
Versatile relative entropy bounds for quantum networks
Luca Rigovacca, Go Kato, Stefan Bäuml +3
We provide a versatile upper bound on the number of maximally entangled qubits, or private bits, shared by two parties via a generic adaptive communication protocol over a quantum…
Fundamental limitation on quantum broadcast networks
Stefan Bäuml, Koji Azuma
The ability to distribute entanglement over complex quantum networks is an important step towards a quantum internet. Recently, there has been significant theoretical effort, mainl…
Witnessing entanglement by proxy
Stefan Bäuml, Dagmar Bruß, Marcus Huber +2
Entanglement is a ubiquitous feature of low temperature systems and believed to be highly relevant for the dynamics of condensed matter properties and quantum computation even at h…
Limitations on Quantum Key Repeaters
Stefan Bäuml, Matthias Christandl, Karol Horodecki +1
A major application of quantum communication is the distribution of entangled particles for use in quantum key distribution (QKD). Due to noise in the communication line, QKD is in…