quantum entanglement means: measuring one qubit instantly determines the other's state

What if measuring one particle instantly tells you about another?

Imagine you and a friend have a pair of gloves, one left-handed and one right-handed, split across the globe. You need to find out which glove you have without seeing it.

Quantum entanglement means that if you measure the left-handed glove's orientation, your friend's glove orientation instantly becomes known, even if they're far away. The technical term is "entangled state."

Example

If your glove is found to be left-handed, your friend's glove must be right-handed.

Remember this

Entanglement instantaneously links particles' states, regardless of distance.

Text adapted from Wikipedia, licensed under CC BY-SA 4.0.

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