What is “information” as used in physics?

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Hello,

I have been watching a ton of Youtube videos trying to under exactly what is meant by “information” when used in physics. All the videos they discuss possible means, methods, conceptions of “how, why where” information is.

But, I cannot wrap my head around what exactly information IS?

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3 Answers

Anonymous 0 Comments

The best eli5 answer I know of is [this](https://www.symmetrymagazine.org/article/what-is-quantum-information) one.

In a nutshell, in classical physics information is stored in bits, either 0 or 1. But when physicists talk about information they’re almost always talking about quantum information, which is stored in qubits, which behave differently, based on probabilities and being in multiple states at once until the moment of observation.

No, I don’t really understand it, either, but quantum computing and quantum information are the terms you should be googling if you want to understand what physicists are talking about when they say “information.”

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