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Trapped Ion Quantum Computing

Device independent witnessing of unknown quantum channels

arXiv
Authors: Michele Dall'Arno, Sarah Brandsen, Francesco Buscemi

Year

2015

Paper ID

26088

Status

Preprint

Abstract Read

~2 min

Abstract Words

95

Citations

N/A

Abstract

Quantum process tomography, the standard procedure to characterize any quantum channel in nature, is affected by a circular argument: in order to characterize the channel, the tomographic preparation and measurement need in turn to be already characterized. We break this loop by designing an operational framework able to optimally characterize any given unknown quantum channel in a device-independent fashion, namely, by only looking at its input-output statistics, under the sole assumption that quantum theory is valid. We provide explicit solutions, in closed form, for practically relevant cases such as the erasure, depolarizing, and amplitude-damping channels.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • Quantum process tomography, the standard procedure to characterize any quantum channel in nature, is affected by a circular argument: in order to characterize the channel, the...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1511.05260 [2] arXiv https://arxiv.org/abs/1511.05260 [3] Publisher https://arxiv.org/abs/1511.05260

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