Related papers: Self-consistent tomography and measurement-device independent cryptography

Self-consistent tomography and measurement-device independent cryptography

URL: http://arxiv.org/abs/2006.06559v1
Date: Thu, 11 Jun 2020 16:13:44 GMT
Title: Self-consistent tomography and measurement-device independent cryptography
Authors: I.D. Moore and S.J. van Enk
Abstract summary: A recurring problem in quantum mechanics is to estimate either the state of a quantum system or the measurement operator applied to it. Data of such quantum estimation experiments come in the form of measurement frequencies.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: A recurring problem in quantum mechanics is to estimate either the state of a quantum system or the measurement operator applied to it. If we wish to estimate both, then the difficulty is that the state and the measurement always appear together: to estimate the state, we must use a measurement; to estimate the measurement operator, we must use a state. The data of such quantum estimation experiments come in the form of measurement frequencies. Ideally, the measured average frequencies can be attributed to an average state and an average measurement operator. If this is not the case, we have correlated state-preparation-and-measurement (SPAM) errors. We extend some tests developed to detect such correlated errors to apply to a cryptographic scenario in which two parties trust their individual states but not the measurement performed on the joint state.

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