That raised the question, how do you make Rydberg atoms, and the answer is (always!) with lasers: https://en.wikipedia.org/wiki/Rydberg_atom https://en.wikipedi

That raised the question, how do you make Rydberg atoms, and the answer is (always!) with lasers: https://en.wikipedia.org/wiki/Rydberg_atom https://en.wikipedia.org/wiki/Rydberg_atom