Hi! My name is Dominik and I am a postdoc in the group of Prof. J. Ignacio Cirac at the Max-Planck Institute for Quantum Optics in Garching near Munich. I am also a consultant for the quantum-computing startup QuEra. My research revolves around understanding the power of quantum computers. I tackle different aspects of this question using tools from quantum optics, computer science and condensed matter physics. Hop over to the research page to find out more.

When I’m not in the office, you can often find me in the mountains.

News

August 21, 2023

Phase sensitive measurements are an essential tool in quantum computing and quantum metrology. The Hadamard test offers a general subroutine for this purpose, although at a cost that is often prohibitive for current noisy quantum computers. In this new preprint, we describe a method for phase-sensitive measurements that significantly reduces the cost as it requires no controlled operations or ancillary qubits. Unlike the Hadamard test, the method does not rely on intereference, but rather uses tools from complex analysis.

June 22, 2023

New preprint on the arXiv! We study obstacles encountered during adiabatic optimization with Rydberg atom arrays. We find that even very simple problems can exhibit super-exponentially small gaps, which render the adiabatic algorithm highly inefficient. We explore different approaches to overcoming these limitations and uncover connections to quantum many-body scars.

June 19, 2023

Two-dimensional semiconductors are a promising platform for applications in classical and quantum optics (see the research page for details). I collaborated with experimentalists from the University of Maryland on this new preprint to explain the physical origin of the strong optical nonlinearity in doped trilayer WSe₂.

March 15, 2023

Ever wondered why Trotter expansions often work better than expected? This new preprint by Yilun Yang, Arthur Christianen, and collaborators gives answers! We show that large Trotter steps can still be useful because of prethermalization. Together with a new error mitigation method, this puts quantum simulation of equilibrium properties on noisy quantum computers within reach.
Update: The paper has been published in PRX Quantum!

Oct 21, 2022

New preprint on the arXiv! Together with Álvaro Alhambra, I show that time evolution under local Hamiltonians can be classically simulated at short times. See the research page for more details.
Update: The paper has been published in PRX Quantum!