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Interferometric single-shot parity measurement in InAs-Al hybrid devices

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Peer-reviewed Majorana-readout milestone associated with Microsoft’s 2025 topological-qubit program. Demonstrates single-shot interferometric parity measurement in InAs-Al hybrid devices, a key enabling ingredient for future tetron-style measurement-only control. It does not by itself establish a full 8-tetron processor or a protected logical-gate demonstration.

Key Results

  • Single-shot interferometric fermion-parity measurement in an InAs-Al hybrid device.
  • Signal-to-noise ratio of 1 in 3.6 s at optimal flux values.
  • Parity-state dwell time longer than 1 ms and assignment error probability of about 1%.
  • Builds directly on the earlier topological-gap-protocol device program.

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