In 1935, Einstein asked a profound question about our understanding of Nature: are objects only influenced by their nearby environment? Or could, as predicted by quantum theory, looking at one object sometimes instantaneously affect another far-away object? We tried to answer that question, by performing a loophole-free Bell test.
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres
B. Hensen, H. Bernien, A.E. Dréau, A. Reiserer, N. Kalb, M.S. Blok, J. Ruitenberg, R.F.L. Vermeulen, R.N. Schouten, C. Abellán, W. Amaya, V. Pruneri, M. W. Mitchell, M. Markham, D.J. Twitchen, D. Elkouss, S. Wehner, T.H. Taminiau, R. Hanson
Nature, published online October 21, 2015.
link to online article
In this animation, a short overview of the concepts and history of the Bell test is given, and how our experimental result fits in the story.
This animation explains how the Bell test works.