About Chaos (or why you should carry an umbrella with you tomorrow)

It is an amazing, yet often overlooked, feeling to go out of your house, fully clad in summer clothes, look up to a blue sky and a bright sun and knowing it will be like that all day. That a storm will not suddenly pop up and ruin your grilling and make you walk soaked to your house, right?

Well, we owe that nice feeling to the countless meteorologists that devote their lives to studying the weather and also try to apply that science to everyone’s everyday life. This is a fundamental property of any scientific theory: prediction. Or in weather-like slang, forecast.

But how is this forecast done, and how is it related to many body physics?

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The Hitchhikers Guide to Many Body Physics

Science can be sometimes daunting for the unexperienced. Have you ever seen a scientific talk, or read a paper? There tends to be a lot of jargon flying around, circling the speaker to then buzz aggressively around the audience before it goes out the windows into the oblivion of the coffee break.

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Many Body Physics

We really should have started with some fancy quote, spoken in the past, and reverberating into the ages to come. But we didn’t. So let’s start instead with a small experiment. Fill a cup with something. No, not coffee, we know you were thinking about it. Something clear. You need to see through it. You also need to have some little pieces of something floating homogeneously around in your cup, like chia seeds once they are really squishy, or that weird aloe drink they sell at the supermarket. The latter, in fact, proves to be the best for this experiment.

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