montechristo

joined 3 months ago
[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

Typical transition frequencies between two levels of an atom are 10^15Hz. The coupling between atoms and light is on the order of the decay rate at which photons are transmitted, which sits at around 10^6Hz.

[–] [email protected] 4 points 2 weeks ago (2 children)

I describe the atoms using a so called Lindblad master equation. The atoms are kept in this description, but the light field is eliminated using two assumptions:

  1. The coupling between the two is very weak.
  2. Correlations between the two decay so fast that this can be considered instantaneous.

The later produces white noise.

[–] [email protected] 23 points 2 weeks ago* (last edited 2 weeks ago) (5 children)

I work on quantum systems coupled to noisy environments (noisy as in causing random fluctuations). Atoms coupled to a light field are my specialty. Anyway, I just got invited by a predatory journal in the field of acoustics, vibrations and noise?!

[–] [email protected] 12 points 3 weeks ago

Except they know that they would have to cover the apple in a thin metallic layer for it to be observable under an electron microscope :D

[–] [email protected] 32 points 1 month ago

Thank god the universe is purely described using linear algebra.

[–] [email protected] 88 points 1 month ago (5 children)

Lovely picture! Either I don't get the meme part or I can't find Saddam.

[–] [email protected] 4 points 1 month ago (1 children)

Zum Thema Luke Mockridge: Absoluter Idiot.

Zum Comic: Warum ist das niedrigere Geschoss heller? Beleuchtet man Stockwerke nicht typischerweise immer gleich?

[–] [email protected] 8 points 2 months ago* (last edited 2 months ago)

If you ever find yourself among theoretical physicists and/or astrophysicists and need a conversation starter, just ask about unit systems or unitless/natural measurement systems. There is no other profession that is more obsessed about that topic.

Just to put this here:

ħ=1

[–] [email protected] 5 points 2 months ago* (last edited 2 months ago)

Every time I see a reference to Jackson I can only think of this...

https://www.youtube.com/watch?v=mm-4PltMB2A&

[–] [email protected] 5 points 2 months ago

This has always been my biggest gripe with the exposition of this game. While studying physics I did the bare minimum of lab work and then dove into my theoretical specialization.

[–] [email protected] 9 points 2 months ago (1 children)

I remembered it being Newton's gravity potential, but looking at a picture it's just a big blur and could equally well be the force. Anyway, I applaud Ross as a physics layman for calling the scientists out.

[–] [email protected] 3 points 2 months ago

Makes sense. Wigner's contributions are everywhere in physics and parts of math. Must've come from somewhere.

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