Projective measurements can probe non-classical work extraction and time-correlations
arxiv(2022)
摘要
We demonstrate an experimental technique to characterize genuinely
nonclassical multi-time correlations using projective measurements with no
ancillae. We implement the scheme in a nitrogen-vacancy center in diamond
undergoing a unitary quantum work protocol. We reconstruct quantum-mechanical
time correlations encoded in the Margenau-Hills quasiprobabilities. We observe
work extraction peaks five times those of sequential projective energy
measurement schemes and in violation of newly-derived stochastic bounds. We
interpret the phenomenon via anomalous energy exchanges due to the underlying
negativity of the quasiprobability distribution.
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