Postselecting on the no-jump measurement in a one- or two-ancilla circuit improves state and channel fidelity under amplitude-damping noise, leaving a residual amplitude attenuation.
Jamio lkowski, Reports on Mathematical Physics3, 275 (1972)
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Quantum Purification for Amplitude Damping Noise
Postselecting on the no-jump measurement in a one- or two-ancilla circuit improves state and channel fidelity under amplitude-damping noise, leaving a residual amplitude attenuation.