Axel Dahlberg

Room B205

+31(0)15 2788191
Wehner Group

I come from a small place called Onsala south of Gothenburg in Sweden. In Gothenburg I did my Bachelor at Chalmers in engineering physics but became more interested in theoretical physics and finished with a bachelor thesis on higher-dimensional black holes and group theory. After this I moved to Switzerland to do a master at ETH. Here I found a great interest for quantum information theory and did a master thesis on quantum error-correction codes in the group of Renator Renner.

Now I’m doing a PhD in the group of Stephanie Wehner with the main focus on how to efficiently route entanglement in a quantum network. I investigate, for example, graph states and how these can be manipulated locally, from which I have found an increasing interest for graph theoretical problems.
I also consider what good protocols and interfaces are for keeping track of qubits and states in such a network.

When I am not thinking about routing entanglement I enjoy going climbing.


Distributed Routing in a Quantum Internet
Kaushik Chakraborty, Filip Rozpedek, Axel Dahlberg, Stephanie Wehner
arXiv preprint arXiv:1907.11630 (2019)

Transforming graph states to Bell-pairs is NP-Complete
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
arXiv preprint arXiv:1907.08019 (2019)

The complexity of the vertex-minor problem
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
arXiv preprint arXiv:1906.05689 (2019)

Counting single-qubit Clifford equivalent graph states is #P-Complete
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
Journal of Mathematical Physics 61, 022202 (2020)
online – arXivpdf

A Link Layer Protocol for Quantum Networks
Axel Dahlberg, Matthew Skrzypczyk, Tim Coopmans, Leon Wubben, Filip Rozpędek, Matteo Pompili, Arian Stolk, Przemysław Pawełczak, Robert Knegjens, Julio de Oliveira Filho, Ronald Hanson, Stephanie Wehner
Proceedings of ACM SIGCOMM 2019, pp 159-173 (2019)
Find more information about this work on the highlights page.

Transforming graph states using single-qubit operations
Axel Dahlberg, Stephanie Wehner
Philosophical Transactions of the Royal Society A 376, 2123 (May 28, 2018)

How to transform graph states using single-qubit operations: computational complexity and algorithms
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
arXiv preprint arXiv:1805.05306 (2018)

SimulaQron – A simulator for developing quantum internet software
Axel Dahlberg, Stephanie Wehner
Quantum Science and Technology 4, 015001 (2018)
online – arXiv – pdf