RESEARCH

Connecting quantum devices to exploit their full potential is the next step in establishing useful applications of quantum technologies and making them accessible to a wide audience. Building such a quantum internet requires the development of new protocols, for example for entanglement distillation, certification and distribution of quantum states. We approach these issues not only from a fundamental perspective, but also consider practical limitations - such as decoherence, noise and imperfections - and analyze both their effects and ways to minimize them.

Quantum Networks

Quantum Sensor Networks

... and more

News & Activities

New pre-print: Strategy optimization for quantum conference key agreement in asymmetric star network
We simulate a multipartite conference key agreement protocol and analyse the complex interplay of varying the number of parties, the number of memories, and asymmetric distances on the performance of this protocol. We demonstrate that small changes in the setup can have drastic impact on the performance of the protocol and that optimizing cut-off times is essential.

New pre-print: Analytical and Compressed Simulation of Noisy Stabilizer Circuits
We develop efficient analytical and compressed simulation methods for noisy stabilizer circuits, enabling efficient and exact Pauli expectation-value calculations and faster sampling through preprocessing.

Blind quantum computing with different qudit resource state architectures
Our work on "Blind quantum computing with different qudit resource state architectures" was published in Physical Review A.

Measurement-based quantum computing with qudit stabilizer states
Our work on "Measurement-based quantum computing with qudit stabilizer states" was published in Quantum Science and Technology.

New Pre-print: On the power of moving quantum sensors
We show how a single controllable moving quantum sensor can selectively extract arbitrary spatial features of correlated fields while completely rejecting orthogonal noise, outperforming even entangled static sensor networks and achieving measurement precision beyond static fundamental limits.

Long-ranged gates in quantum computation architectures with limited connectivity
Our work on "Long-ranged gates in quantum computation architectures with limited connectivity" was published in Quantum Sci. Techn..

Experimental distributed quantum sensing in a noisy environment
The group of Ben Lanyon has demonstrated our distributed quantum sensing protocol using decoherence-free subspaces. The joint paper was published in Phys. Rev. Lett.. >> To News article

New Pre-Print: Self-Configuring Quantum Networks with Superposition of Trajectories
We propose a self-configuring approach for quantum networks that integrates superposed quantum paths with variational quantum optimization techniques.

New Pre-Print: Quantum Simulation of noisy quantum networks
We show how to use quantum computers to simulate noisy quantum networks. The approach is based on transforming the noise of a quantum computer to the desired target form, so that it resembles the one of noisy network devices, channels and operations. In this way, quantum network protocols of large systems can be simulated on existing, noisy quantum computers.