Martin Bauerさんのイラストまとめ

@jazzwhiz @PKoppenburg Standard Model particles and the countries they were discovered in

j) the QCD blob

Feynman bestiary:

a) the penguin

Quantum dots are nanometer-sized systems where a 2 dimensional electron gas can be confined. The energy levels of the electrons are then dictated by the 2D potential in the quantum dot.

By carefully adding single electrons, quantum dots can be used to simulate 2D atoms! 2/7

2-dimensional analogies are often used to motivate physical concepts in our 3+1 dimensional world. But a world with 2 space and 1 time dimensions would look *very* different from our world

Some crucial differences:🧵 1/10

This ignores, that there is no known species of reindeers that can fly…

also, if each household gets 1kg worth of presents the sleigh is carrying at least 86 000 tons (not counting Santa)

This works out to ~770 visits per second.

Santa has ~1/1000 seconds to

- park
- hop out of the sleigh
- jump down the chomney
- leave the right presents
- eat any snacks
- move to the next house

You could object now that maybe if we cannot *see* the extra dimension, gravity cannot enter it either.

This is not possible.

Gravity *is* the curvature of spacetime. While matter and other forces can, gravity can never be confined to a subspace

https://t.co/ZSUcaMRuGm