A5050964750- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Advanced Electrical Measurement Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Mechanics and Applications
- Quantum Electrodynamics and Casimir Effect
Bavarian Academy of Sciences and Humanities
2024-2025
Technical University of Munich
2025
Quantum state tomography of weak microwave signals is an important part many protocols in the field quantum information processing with superconducting circuits. This step typically relies on accurate estimation signal losses experimental setup and requires a careful photon-number calibration. Here, we present improved method for loss inside closed cryogenic system. Our approach based Planck’s law makes use independent temperature sweeps individual parts setup. Using this technique, can...
Scalable quantum information processing with superconducting circuits is about to advance from individual processors in single dilution refrigerators more powerful distributed computing systems located separate cooling units order achieve a practical advantage. Hence, realization of hardware platforms for local area networks (QLANs) compatible technology high importance. Here, we demonstrate basic prototype microwave QLAN based on cryogenic link connecting two cryostats over distance 6.6m...
Security of modern classical data encryption often relies on computationally hard problems, which can be trivialized with the advent quantum computers. A potential remedy for this is communication takes advantage laws physics to provide secure exchange information. Here, key distribution (QKD) represents a powerful tool, allowing unconditionally between remote parties. At same time, microwave set play an important role in future networks because its natural frequency compatibility...
Security of modern classical data encryption often relies on computationally hard problems, which can be trivialized with the advent quantum computers. A potential remedy for this is communication takes advantage laws physics to provide secure exchange information. Here, key distribution (QKD) represents a powerful tool, allowing unconditionally between remote parties. At same time, microwave set play an important role in future networks because its natural frequency compatibility...
Superconducting circuits incorporating Josephson elements represent a promising hardware platform for quantum technologies. Potential applications include scalable computing, microwave networks, and quantum-limited amplifiers. However, progress in junction-based technologies is facing the ongoing challenge of minimizing loss channels. This also true parametric superconducting devices based on nonlinear resonators. In this work, we report fabrication characterization low-loss operated GHz...
Quantum state tomography of weak microwave signals is an important part many protocols in the field quantum information processing with superconducting circuits. This step typically relies on accurate $\textit{in-situ}$ estimation signal losses experimental set-up and requires a careful photon number calibration. Here, we present improved method for loss inside closed cryogenic system. Our approach based Planck's law makes use independent temperature sweeps individual parts set-up. Using...