New qubit application
Simplified fabrication method for superconducting Josephson junctions
Exhibitors
Location
Hall 11, Stand B06
Description
Superconducting quantum circuits are already being used in measuring and sensing devices. The so-called Josephson junction is used as a central element to construct quantum bits (qubits) and is incorporated into quantum circuits. A typical Josephson contact (JC) consists of two superconducting aluminum layers separated by an ultrathin insulating oxide layer. When a current is applied between the two superconducting layers, electrons can combine across the barrier to form Cooper pairs and image quantum mechanical tunneling processes. Established methods for fabrication include double-angle shadow evaporation or a combination of lithography and etching. Both techniques have in common that several steps are needed. A simplified process for the production of JC has been developed by researchers of the Physics Institute (PHI) at KIT. All necessary parts of a quantum circuit (capacitance, inductance, and nonlinearity) are vapor deposited in the form of a single layer of superconducting granular aluminum (GrAl), in short single-layer evaporation. Under an oxygen atmosphere, aluminum grains a few nanometers in size form in an oxide matrix, forming a three-dimensional structure with many nanocontacts. With the help of a narrowing of the superconducting layer to about 20 nanometers, the nanojunctions become an effective Josephson junction. Single-layer evaporation simplifies fabrication overall and increases reproducibility. Since only a single layer is deposited, the contacts can be much smaller in size. This size advantage directly results in lower sensitivity to magnetic fields. Qubits produced with the new process achieve a coherence time of about 10 microseconds. Wherever Josephson junctions are already used today, the KIT nanocontacts can also be used. KIT is looking for partners, especially from the hardware and electronics sectors, for application-specific development projects and for licensing the technology.
To Product PageContact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
Locations
More Products
Highly efficient gas turbines
Cooperative industrial robots
Quantum networks
Multi-material Ceramics
Fusion - The Breeding Blanket
Open-flow Electrolysis Cell
Fast and easy robot calibration
photreon
Hyperloop "Polaris"
HECTOR School
Hand-eye Calibration for Robots
Exoskeleton for more mobility
Chip architecture for quantum circuits
Thermomagnetic generators
Clean coating without biocides
Research truck for hydrogen technologies
Solar cells with thermoplastic busbars
Physically recycling rare earths
Lithium extraction from geothermal water
Testing highly automated vehicles
Pipe production with internal structures
Sorting without compressed air
High resolution radar with communication
Bio-Tag protects against product piracy
4WD-Acoustic-Chassis-Dynamometer
Direct synthesis of hydrogen peroxide
XFRP spring with varying fiber mixture
Experience smart machines and IIoT
Detecting Surfaces with Machine Learning
Image Generation: Tomographic Processes
Automobiles on the test bench
Robot tests power tools
Biodegradable parylene coatings
Smart Data Potential Analyses for SMEs
Condition monitoring in production
3D microwave printer
Non-contact torque measurements
Pure white on polymer basis
Breast Cancer Detection by 3D Ultrasonic
Power Hardware-in-the-Loop as Real Lab
High-pressure saturator for engineering
Cooling and Heating with Solids
Direct wind-to-heat conversion
Test for fuel cell systems
SAGAS – Flexible gas analysis system
A serendipitous sensor system
Mobile measurements for thermal water
Simulate atomization at multiple scales
A pulsating flame
Sustainable cement
Ethylene-free synthesis of polyethylene
Three-phase hybrid converter
Recycling in demolition processes
Long-life Batteries
Optimization of solar cells
High-temp storage for process heat
Electric motors on the test rig
Coupling system for electrical storage
New recycling process for batteries
Thermal validation for battery cells
Environmentally friendly solar cells
Characterization power semiconductors
From vehicle noise to warning system
Interested in news about exhibitors, top offers and trends in the industry?
Hotline:
+49 (0)511 89-0
Deutsche Messe AG
Cookie Settings
Browser Notice
Your web browser is outdated. Update your browser for more security, speed and optimal presentation of this page.
Update Browser