Under post-selected no-jump filtering, qubit states with a fixed quantum Hamming weight are perfectly preserved against amplitude-damping noise, while superposition states face a fidelity lower bound set by their Hamming distance.
Quantum error correction for quantum memories,
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Quantum States Protection under Environmental Noise
Under post-selected no-jump filtering, qubit states with a fixed quantum Hamming weight are perfectly preserved against amplitude-damping noise, while superposition states face a fidelity lower bound set by their Hamming distance.