Interference of Quantum Channels
classification
🪐 quant-ph
keywords
interferencemeasurequantumaspectscertainchannelscharacteriseclosest
read the original abstract
We show how interferometry can be used to characterise certain aspects of general quantum processes, in particular, the coherence of completely positive maps. We derive a measure of coherent fidelity, maximum interference visibility and the closest unitary operator to a given physical process under this measure.
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