APPLICATIONS OF TECHNOLOGY:
- Superconducting quantum computers
- High energy physics sensors (e.g., dark matter, cosmic microwave background, neutrino detection)
- Novel fabrication process that is compatible with the qubit microfabrication process (i.e. in terms of materials)
- Prolongs coherence time of qubits and enhances quantum computing capabilities
- Achieves suitable electrical, mechanical, and resonance properties for operation and survivability of the device at temperatures within the range 5 mK to 1 K
- In recent years, interest in research and development of superconducting quantum devices (e.g., qubits) for quantum computers has been expanding rapidly. However, the coherence times of such devices are limited by interference from phonons – coherent thermal oscillation of atoms – which originate from the thermal noise of the device’s surrounding environment.
Researchers at Berkeley Lab have developed thermally isolating superconducting quantum devices from the environment by microfabricating a Micro-ElectroMechanical System (MEMS) structure.
Three approaches and their corresponding fabrication processes were optimized via the MEMS structure, which significantly reduces the ability for external phonons to propagate from the environment to the superconducting quantum devices. Thermal isolation was accomplished through the structure by minimizing phonon transport while maintaining electrical signal transport via superconducting circuit, mechanical sturdiness of the device and its mounting, and resonance quality of the device. For all approaches, the specific design for a particular system was optimized for that system’s target environment temperature, in order to maximally block phonons whose wavelengths are characteristic of thermal distributions from that temperature.
DEVELOPMENT STAGE: Proven principle
FOR MORE INFORMATION:
STATUS: Patent pending.
OPPORTUNITIES: Available for licensing or collaborative research.
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