Journal
SCIENTIFIC REPORTS
Volume 2, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep00885
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Funding
- National Science Council, Taiwan [NSC 101-2112-M-006-016-MY3, NSC 101-2738-M-006-005, NSC 103-2911-I-006-301, NSC 101-2628-M-006-003-MY3]
- National Center for Theoretical Sciences (south)
- Ministry of Education, Taiwan
- Army Research Office
- JSPS-RFBR [09-02-92114]
- MEXT Kakenhi on Quantum Cybernetics
- Funding Program for Innovative R&D on ST (FIRST)
- Grants-in-Aid for Scientific Research [21102002, 22224007] Funding Source: KAKEN
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Quantum coherence is one of the primary non-classical features of quantum systems. While protocols such as the Leggett-Garg inequality (LGI) and quantum tomography can be used to test for the existence of quantum coherence and dynamics in a given system, unambiguously detecting inherent quantumness still faces serious obstacles in terms of experimental feasibility and efficiency, particularly in complex systems. Here we introduce two quantum witnesses to efficiently verify quantum coherence and dynamics in the time domain, without the expense and burden of non-invasive measurements or full tomographic processes. Using several physical examples, including quantum transport in solid-state nanostructures and in biological organisms, we show that these quantum witnesses are robust and have a much finer resolution in their detection window than the LGI has. These robust quantum indicators may assist in reducing the experimental overhead in unambiguously verifying quantum coherence in complex systems.
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