English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The recently reported violation of a Bell inequality using entangledelectronic spins in diamonds (Hensen et al., Nature 526, 682-686) provided thefirst loophole-free evidence against local-realist theories of nature. Here wereport on data from a second Bell experiment using the same experimental setupwith minor modifications. We find a violation of the CHSH-Bell inequality of$2.35 \pm 0.18$, in agreement with the first run, yielding an overall value of$S = 2.38 \pm 0.14$. We calculate the resulting $P$-values of the secondexperiment and of the combined Bell tests. We provide an additional analysis ofthe distribution of settings choices recorded during the two tests, findingthat the observed distributions are consistent with uniform settings for bothtests. Finally, we analytically study the effect of particular models of randomnumber generator (RNG) imperfection on our hypothesis test. We find that thewinning probability per trial in the CHSH game can be bounded knowing only themean of the RNG bias, implying that our experimental result is robust for anymodel underlying the estimated average RNG bias.

Loophole-free Bell test using electron spins in diamond: second experiment and additional analysis