Experimental detection of quantum coherent evolution through the violation of Leggett-Garg-type inequalities
Abstract
We discuss the use of inequalities of the Leggett-Garg type (LGtI) to witness quantum coherence and present the first experimental violation of this type of inequalities using a light-matter interfaced system. By separately benchmarking the Markovian character of the evolution and the translational invariance of the conditional probabilities, the observed violation of a LGtI is attributed to the quantum coherent character of the process. These results provide a general method to benchmark `quantumness' when the absence of memory effects can be independently certified and confirm the persistence of quantum coherent features within systems of increasing complexity.
- Publication:
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arXiv e-prints
- Pub Date:
- September 2012
- DOI:
- 10.48550/arXiv.1209.2176
- arXiv:
- arXiv:1209.2176
- Bibcode:
- 2012arXiv1209.2176Z
- Keywords:
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- Quantum Physics
- E-Print:
- published version, including supplementary material