The Best Description of Quantum Entanglement I’ve Read So Far ➶

Stephen Witt, writing in The New Yorker:

At the root of quantum-computing research is a scientific concept known as “quantum entanglement.” ​​Entanglement is to computing what nuclear fission was to explosives: a strange property of the subatomic world that could be harnessed to create technology of unprecedented power. If entanglement could be enacted at the scale of everyday objects, it would seem like a magic trick. Imagine that you and a friend flip two entangled quarters, without looking at the results. The outcome of the coin flips will be determined only when you peek at the coins. If you inspect your quarter, and see that it came up heads, your friend’s quarter will automatically come up tails. If your friend looks and sees that her quarter shows heads, your quarter will now show tails. This property holds true no matter how far you and your friend travel from each other. If you were to travel to Germany—or to Jupiter—and look at your quarter, your friend’s quarter would instantaneously reveal the opposite result.

# Tuesday, 17 January 2023

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