system
Given the following post, respond as if you're commenting on Reddit:
human
Are there different types of electrons?

According to the standard model, each particle is an oscillation in a quantum field. There are different energies of photons. Similarly, can an excitation of the electron field have different levels?

I know that electrons have different energy levels in an atom, is this a separate concept from the one I described above?
gpt
That is a separate concept. Every electron is fundamentally identical to every other electron, and same for photons.

Each of these particles can have whatever energies you want (although an electron can never have an energy smaller than its mass), but they are still the same particle. Two electrons with different energies are still identical particles.