Nonclassical Temporal Correlations Enhance the Performance of Ticking Clocks
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Date
2020Type
- Working Paper
ETH Bibliography
yes
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Abstract
We investigate the role of nonclassical temporal correlations in enhancing the performance of ticking clocks in a discrete-time scenario. We show that the problem of optimal models for ticking clocks is related to the violation of Leggett-Garg-type temporal inequalities formulated in terms of, possibly invasive, sequential measurements, but on a system with a bounded memory capacity. Moreover, the idea of ticking clocks inspires the derivation of a new family of temporal inequalities showing a gap between classical and quantum correlations. We present analytical and numerical results showing that quantum ticking-clock models achieving accuracy beyond the classical bound are also those violating Leggett-Garg-type temporal inequalities for finite sequences. We also investigate the continuous limit of our models and its relation with known results in the literature. Show more
Publication status
publishedExternal links
Journal / series
arXivPages / Article No.
Publisher
Cornell UniversityOrganisational unit
03781 - Renner, Renato / Renner, Renato
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ETH Bibliography
yes
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