this post was submitted on 19 Oct 2024
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Science Memes

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submitted 2 weeks ago by [email protected] to c/[email protected]
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[–] [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?!

[–] trolololol 6 points 2 weeks ago (3 children)

Hey, noise is noise. What color is yours, white, pink or blue?

[–] [email protected] 4 points 2 weeks ago (1 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.

[–] trolololol 4 points 2 weeks ago (1 children)

That's cool

In most fields " so fast that's instantaneous" is pretty fast, but in nuclear and quantum physics that's a whole new level.

What is the order of magnitude of your " too fast ”? I will invert that to state the bandwidth in Hertz.

[–] [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.

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