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Eric Kubischta

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Preprint Aug 2026

Time-Reversal Selection Rules for Quantum Error Correction

We apply time-reversal symmetry to quantum codes and show that it imposes parity selection rules on the physical error algebra. A time-reversal-invariant logical qubit on an odd number of spins is a Kramers doublet, forcing every even-weight Pauli to act as a scalar. Consequently, all even-weight Knill--Laflamme condit...

Eric Kubischta, Ian Teixeira · 1 citation

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