Two labs, one medium: replaying the Delft heralded Bell test, spins 1.3 km apart
The experiment recreated here is Hensen et al., Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres, Nature 526, 682 (2015), done at Delft University of Technology.
Press Play to watch continuously, Step to go one stage at a time, or Run 100 / Run 1000 to build up the statistics. To see just the turn, use the table under the stage: pick any pair of angles and watch the primary's turn carried across the link rods. The in-step slider is illustrative: the real herald is far rarer.
Replay
What the turn does: every combination of start and coins
| Start | Lab A pick | Lab B pick | Primary | Primary's pick E | Turn from start | Secondary's pick | Gap | Flip chance | Flip share needed |
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What each lab records: (−) on the left, (+) on the right
Balance check: share of (−) in each box against the real-world 50:50
Comparison after the fact: Different % for each angle pair
|S| as the runs build up
Last runs
| # | H | Primary | Lab A | Lab B | E | Gap | Flip chance | Flip | Signs (A, B) | Pair |
|---|