Qubit Zoo

A superconducting dual-rail cavity qubit with erasure-detected logical measurements

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Experimental dual-rail qubit encoded in the single-photon subspace of two superconducting cavities, with projective logical measurement integrated with erasure detection.

Key Results

  • Logical state preparation and measurement error at the 0.01% level
  • More than 99% of cavity-decay events detected as erasures
  • Decay errors near 0.2% per microsecond, phase errors six times lower, and bit flips at least 140 times lower

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