Andreas Wallraff

Single-Shot Quantum Nondemolition Detection of Individual Itinerant Microwave Photons

2018 · Physical Review X

Single-photon detection is an essential component in many experiments in quantum optics, but it remains challenging in the microwave domain. We realize a quantum nondemolition detector for propagating microwave photons and characterize its performance using …

Device-Independent Randomness Amplification

2024 · arXiv (Cornell University)

Successful realization of Bell tests has settled an 80-year-long debate, proving the existence of correlations which cannot be explained by a local realistic model. Recent experimental progress allowed to rule out any possible loopholes in …

Performance characterization of a multi-module quantum processor with static inter-chip couplers

2026 · EPJ Quantum Technology

Abstract Three-dimensional integration technologies such as flip-chip bonding are a key prerequisite to realize large-scale superconducting quantum processors. Modular architectures, in which circuit elements are spread over multiple chips, can further improve scalability and performance …