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

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News & Activities

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.

New Pre-Print: Blind quantum computing with different qudit resource state architectures
We discuss how blind quantum computing generalizes to multi-level quantum systems (qudits), enabling secure cloud-based quantum computation.

New Pre-Print: Improved Quantum Sensing by Spectral Design
We show how unitary control can improve parameter estimation by designing the effective spectrum of the imprinting Hamiltonian.

New Pre-Print: Measurement-based quantum computing with qudit stabilizer states
We demonstrate how to perform measurement-based quantum computing on qudits (high-dimensional quantum systems) using stabilizer state resources beyond the cluster state.

New Pre-Print: Graph state extraction from two-dimensional cluster states
We find schemes for the extraction of arbitrary multipartite graph states from two-dimensional cluster states, which have applications in entanglement-based quantum networks, sensor networks, and distributed quantum computing.