@article{Jae:2024:10.1038/s41534-024-00862-5,
author = {Jae, J and Lee, J and Kim, MS and Lee, K-G and Lee, J},
doi = {10.1038/s41534-024-00862-5},
journal = {npj Quantum Information},
title = {Contextual quantum metrology},
url = {http://dx.doi.org/10.1038/s41534-024-00862-5},
volume = {10},
year = {2024}
}

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TY  - JOUR
AB  - We demonstrate that the contextuality of measurement selection can enhance the precision of quantum metrology with a simple linear optical experiment. Contextuality is a nonclassical property known as a resource for various quantum information processing tasks. Recent studies show that contextuality by anomalous weak values can be utilized to enhance metrological precision, unraveling the role of contextuality in quantum metrology. Our contextual quantum metrology (coQM) scheme can elevate the precision of the optical polarimetry as much as 6 times the precision limit given by the Quantum Fisher Information. We achieve the contextuality-enabled enhancement with two mutually complementary measurements, whereas, in the conventional method, some optimal measurements to achieve the precision limit are either theoretically challenging to find or experimentally infeasible to realize. These results highlight that the contextuality of measurement selection is applicable in practice for quantum metrology.
AU  - Jae,J
AU  - Lee,J
AU  - Kim,MS
AU  - Lee,K-G
AU  - Lee,J
DO  - 10.1038/s41534-024-00862-5
PY  - 2024///
SN  - 2056-6387
TI  - Contextual quantum metrology
T2  - npj Quantum Information
UR  - http://dx.doi.org/10.1038/s41534-024-00862-5
UR  - http://hdl.handle.net/10044/1/113544
VL  - 10
ER  - 

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