What are bell states?

Bell states are special pairs of coins that behave like best friends, wherever one goes, the other follows, even if they're far apart.

Imagine you and your friend each have a coin. You both flip them at the same time. Now, no matter how far apart you are, if your coin shows heads, your friend’s coin always shows tails, or maybe it's the other way around. These coins are like Bell states, they’re connected in such a special way that what happens to one instantly affects the other.

Think of Bell states as twin coins that were flipped together at the same time. Even if you take one coin across the world, when you look at it, your friend can instantly know what their coin shows, without even looking!

This connection is so strong that scientists use Bell states to do cool things like sending messages in secret or making super-fast computers.

It's like having a special pair of coins that are always in sync, no matter how far apart they go. Bell states are special pairs of coins that behave like best friends, wherever one goes, the other follows, even if they're far apart.

Imagine you and your friend each have a coin. You both flip them at the same time. Now, no matter how far apart you are, if your coin shows heads, your friend’s coin always shows tails, or maybe it's the other way around. These coins are like Bell states, they’re connected in such a special way that what happens to one instantly affects the other.