25-05-2022
New paper in Nature
We are very happy that our joint work with the experimental team of Ronald Hanson has now been published in Nature! Admittedly, this is however foremost an achievement of the experimental team – congrats everybody!
19-05-2022
Hamiltonian learning - new preprint out

In our new preprint we propose an efficient, noise robust method for estimating the underlying dynamics of a large quantum device. The work is the result of a fruitful collaboration with Daniel and Albert from QMATH, Copenhagen and Slava, QuTech. You can read about here
28-12-2021
New preprint out
Ensuring security and integrity of elections constitutes an important challenge with wide-ranging societal implications. Classically, security guarantees can be ensured based on computational complexity, which may be challenged by quantum computers. We show that the use of quantum networks can enable information-theoretic security for the desirable aspects of a distributed voting scheme in a resource-efficient manner. You can read about in in the preprint https://arxiv.org/abs/2112.14242

21-10-2021
New preprint out
It has been exciting to aid the experimental NV team in Ronald Hanson’s group with numerical simulations as they demonstrated non-neighboring teleportation in the world’s first 3 qubit quantum network. You can read about in in the preprint https://arxiv.org/abs/2110.11373

01-09-2021
New Master student in the group
Welcome to Bernard Wo who will be doing his Master’s project in the group investigating how code concatenation can improve the performance of one-way quantum repeaters!
29-07-2021
New Master student in the group
Welcome to Yunzhe Zheng who will be doing his Master’s project in the group investigating loss tolerance in higher dimensional cluster states.
01-07-2021
New Master student in the group
Welcome to Hemant Sharma who will be doing his Master’s project in the group working on photonic cluster generation with diamond defect centres!
01-06-2021
New Master student in the group!
Welcome to Yorgos Sotiropoulos who will be doing his Master’s project in the group working on integrated multi-qubit entangling gates between quantum emitters in nanophotonic structures and their use for stabilizer measurements. Yorgos will be working both with Fenglei and the group of David Elkouss in connection with the Fujitsu project on a modular quantum computer based on diamond defect centres.
01-03-2021
Tekna Talks Podcast
Johannes had the pleasure of participating in the first episode of Tekna Talks Podcast. A podcast in Quantum computing and artificial intelligence. Very nice concept! You can find the podcast here
Tekna Talks Podcast – A podcast in Quantum Computing & Artificial Intelligence
15-02-2021
New Master student in the group
Welcome to Arlind Visha who will be doing his Erasmus+ Master’s project in the group working on quantum information processing with 2D photonic crystals. Arlind is a student o University of Surrey, UK.
01-11-2020
New Master student in the group
Welcome to Kannan Vijayadharan who will be doing his Master’s project in the group working on quantum enhanced metrology with squeezed light and integrated photonics. Kannan is a student of TU Eindhoven and will be co-supervised by Prof. Stabile.
13-10-2020
Modular quantum computer with Fujitsu.
It is now official that Fujitsu has teamed up with a large research team from QuTech to develop a modular quantum computer based on solid-state qubits. We are very happy to be part of the team and are looking forward to work closely together with the group of Ronald Hanson on linking modules optically via entanglement.
You can read more here

Image credits
Ryoichi Ishihara, Associate Professor Faculty of EEMCS and QuTech
01-10-2020
New postdoc joining the group!
We are very happy that Liubov Markovich is joining the group as a postdoc. Liubov obtained her PhD under the supervision of Prof. V.I. Man’ko in the Moscow Institute of Physics and Technology. She is working on the study of properties and characteristics of quantum systems.
01-10-2020
New PhD student joining the group!
A warm welcome to Fenglei Gu as new PhD student in the group. Fenglei will be working on spin-photon interfaces for both long distance quantum communication and modular quantum computation.
19-05-2020
Can quantum technology be used to prevent electoral fraud?
In the 5th quantum talk from Consulting company KPMG (Denmark), Johannes talks about how quantum networks can ensure secure voting. Something currently being pursued in the group.
Watch the 5th serie of Quantum Talks by KPMG with Johannes Borregaard
15-05-2020
New Master student joining the group!
Joey Baretto will be developing an elaborate framework for characterizing superconducting qubit architectures as part of his Master studies. The project will be carried out in collaboration with an experimental team in Will Olivers group at MIT.
10-05-2020
One-way quantum repeaters in Physical Review X
We are very happy that our work on one-way quantum repeaters has been accepted in Physical Review X! It will soon be published in the journal but it is also possible to read about the work at arXiv (https://arxiv.org/abs/1907.05101)
06-05-2020
Johannes Borregaard in Quantum Talks organized by KPMG
Consulting company KPMG (Denmark) is getting interested in Quantum Technology and will run a series of short quantum talks on Linkedin over the next couple of weeks to raise awareness. In the second video in the series they talk to Johannes about quantum communication.