Technical University of Munich
Lehrstuhl für Quantenalgorithmen und -anwendungen (Prof. Kraus)
James-Franck-Str. 1
85748 Garching b. München
We focus on the development of new theoretical tools for the investigation of quantum many-body systems. Among our research aims are the characterization of the entanglement and complexity properties of multipartite systems, the identification of new applications within quantum information processing, and the verification and validation of quantum devices. More precisely, we are investigating new applications of multipartite entanglement and novel tools for the characterization, the generation, and the manipulation of multipartite entangled states. Moreover, we are aiming at identifying new, feasible applications within quantum information processing and on the verification of current and near-term quantum processors, which are limited in size and fidelity.
Physical Review X
Abstract: Analog quantum simulators offer a route to exploring strongly correlated many-body dynamics beyond classical computation, but their predictive power remains limited by the absence of quantitative…
Quantum
Abstract: In unitary circuit games, two competing parties—an “entangler” and a “disentangler”—can induce an entanglement phase transition in a quantum many-body system. The transition occurs at a certain rate…
Physical Review B
Abstract: Two matrix product states (MPS) are in the same phase in the presence of symmetries if they can be transformed into one another via symmetric short-depth circuits. We consider how symmetry-preserving…
Quantum Science and Technology
Abstract: We discuss Hamiltonian and Liouvillian learning for analog quantum simulation from non-equilibrium quench dynamics in the limit of weakly dissipative many-body systems. We present and compare various…
Physical Review Research
Abstract: Preparation of low-energy quantum many-body states has a wide range of applications in quantum information processing and condensed-matter physics. Quantum cooling algorithms offer a promising…
Quantum Science and Technology
Abstract: With today’s quantum processors venturing into regimes beyond the capabilities of classical devices, we face the challenge to verify that these devices perform as intended, even when we cannot check…
Physical Review Letters
Abstract: Using tools from quantum information theory, we present a general theory of indistinguishability of identical bosons in experiments consisting of passive linear optics followed by particle number…
Physical Review A
Abstract: We present experimentally and numerically accessible quantities that can be used to differentiate among various families of random entangled states. To this end, we analyze the entanglement properties…
Quantum
Abstract: The study of state transformations by spatially separated parties with local operations assisted by classical communication (LOCC) plays a crucial role in entanglement theory and its applications in…
Physical Review Research
Abstract: We present verification protocols to gain confidence in the correct performance of a device implementing an arbitrary quantum computation. The derivation of the protocols is based on the fact that…
