Sustained state-independent quantum contextual correlations from a single ion
Abstract
We use a single trapped-ion qutrit to demonstrate the violation of an input-state-independent non-contextuality inequality using a sequence of randomly chosen quantum non-demolition projective measurements. We concatenate 54 million sequential measurements of 13 observables, and violate an optimal non-contextual bound by 214 standard deviations. We use the same dataset to characterize imperfections including signaling and repeatability of the measurements. The experimental sequence was generated in real time with a quantum random number generator integrated into our control system to select the subsequent observable with a latency below 50 {\mu}s, which can be used to constrain hidden-variable models that might describe our results. The state-recycling experimental procedure is resilient to noise, self-correcting and independent of the qutrit state, substantiating the fact that quantumness is connected to measurements as opposed to designated states.
Cite
@article{arxiv.1706.07370,
title = {Sustained state-independent quantum contextual correlations from a single ion},
author = {F. M. Leupold and M. Malinowski and C. Zhang and V. Negnevitsky and J. Alonso and A. Cabello and J. P. Home},
journal= {arXiv preprint arXiv:1706.07370},
year = {2018}
}
Comments
6+5 pages; 4+7 figures