A5093618400- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Neural Networks and Reservoir Computing
- Advancements in PLL and VCO Technologies
- Diamond and Carbon-based Materials Research
- Advanced Electrical Measurement Techniques
- Thin-Film Transistor Technologies
- Wireless Power Transfer Systems
- Advanced Fiber Laser Technologies
- Quantum and electron transport phenomena
- Analog and Mixed-Signal Circuit Design
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Quantum Mechanics and Applications
Munich Center for Quantum Science and Technology
2025
Technical University of Munich
2024-2025
Bavarian Academy of Sciences and Humanities
2024-2025
Abstract We investigate the growth of amorphous MoSi thin films using magnetron co-sputtering and optimize conditions with respect to crystal structure superconducting properties (e.g., critical temperature $$T_{\text {c}}$$ ). The deposition pressure, Mo:Si stoichiometry substrate are systematically varied achieve a transition 8.4(3) K for thickness 17.7(8) nm 6.2(9) 4.3(4) thick film. For Mo concentrations above 81% crystalline phase $$\hbox {Mo}_\text {3}$$ <mml:math...
Abstract As quantum information technologies advance, challenges in scaling and connectivity persist, particularly the need for long-range qubit efficient entanglement generation. Perfect State Transfer enables time-optimal state transfer between distant qubits using only nearest-neighbor couplings, enhancing device connectivity. Moreover, protocol results effective parity-dependent non-local interactions, extending its utility to Here, we experimentally demonstrate multi-qubit generation on...
To control and measure the state of a quantum system, it must necessarily be coupled to external degrees freedom. This inevitably leads spontaneous emission via Purcell effect, photon-induced dephasing from measurement backaction, errors caused by unwanted interactions with nearby systems. tackle this fundamental challenge, we make use design flexibility superconducting circuits form multimode element—an artificial molecule—with symmetry-protected modes. The proposed circuit consists three...
As systems for quantum computing keep growing in size and number of qubits, challenges scaling the control capabilities are becoming increasingly relevant. Efficient schemes to simultaneously mediate coherent interactions between multiple reduce decoherence errors can minimize overhead next-generation processors. Here, we present a superconducting qubit architecture based on tunable parametric perform two-qubit gates, reset, leakage recovery read out qubits. In this architecture,...
As quantum information technologies advance they face challenges in scaling and connectivity. In particular, two necessities remain independent of the technological implementation: need for connectivity between distant qubits efficient generation entanglement. Perfect State Transfer is a technique which realises time optimal transfer state nodes qubit lattices with only nearest-neighbour couplings, hence providing an important tool to improve device Crucially, protocol results effective...
Protecting qubits from environmental noise while maintaining strong coupling for fast high-fidelity control is a central challenge quantum information processing. Here, we demonstrate novel scheme superconducting fluxonium that eliminates qubit decay through the channel by reducing density of states at transition frequency. Adding low-pass filter on flux line allows flux-biasing and same time coherently controlling parametrically driving it integer fractions its We compare filtered to...
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...
Achieving fast and high-fidelity qubit operations is crucial for unlocking the potential of quantum computers. In particular, reaching low gate errors in two-qubit gates has been a long-standing challenge field superconducting qubits due to their typically long duration relative coherence times. To realize gates, we utilize hybridization between fixed-frequency with strongly interacting coupler mode that tunable frequency. reduce population leakage during required adiabatic passages through...
To control and measure the state of a quantum system it must necessarily be coupled to external degrees freedom. This inevitably leads spontaneous emission via Purcell effect, photon-induced dephasing from measurement back-action, errors caused by unwanted interactions with nearby systems. tackle this fundamental challenge, we make use design flexibility superconducting circuits form multi-mode element -- an artificial molecule symmetry-protected modes. The proposed circuit consists three...