Researchers have developed an engineered germanium-based semiconductor doped with gallium in a precision lattice that shows superconductivity at ~3.5 K — a significant materials result because it preserves crystal order while enabling superconducting behavior. This approach revives and stabilizes an older idea: combine superconductivity with silicon-compatible semiconductors to allow integration of Josephson junctions and qubit elements directly on familiar wafer platforms. The material’s low disorder and compatibility with silicon-germanium processes promise denser device stacking and potentially lower decoherence for qubits. That in turn could make hybrid classical/quantum control components more feasible on the same wafer, streamlining device interconnects and cryogenic packaging. While many engineering challenges remain (cooling, interconnects, error rates), this materials advance reduces a major barrier to scaling quantum processors using existing semiconductor infrastructure.
Source: LiveScience
Link: https://www.livescience.com/technology/computing/new-semiconductor-could-allow-classical-and-quantum-computing-on-the-same-chip-thanks-to-superconductivity-breakthrough
New superconducting semiconductor could let classical and quantum processors share a chip
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