How Do Particles Form Atoms in Light of Heisenberg's Uncertainty Principle?

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Discussion Overview

The discussion revolves around the formation of atoms in the context of Heisenberg's Uncertainty Principle. Participants express confusion about how particles can form atoms when their positions are uncertain, particularly in relation to the conditions following the Big Bang.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that particles must be "seen" to have a position, which would allow them to come together to form atoms.
  • Another participant points out that after the Big Bang, the energy levels were too high for atoms to form until the universe cooled down, questioning the relevance of Heisenberg's principle in this context.
  • A different reply asserts that Heisenberg's principle does not prevent the measurement of a particle's position.
  • One participant expresses a change in understanding, indicating that their confusion has lessened.
  • Another participant notes that even when measuring a particle's position, the Heisenberg Uncertainty Principle still applies.
  • A later contribution introduces the concept of decoherence and discusses the historical context of quantum mechanics, suggesting that wave functions collapse when measurements are made, but this is presented as a complex topic.

Areas of Agreement / Disagreement

Participants express varying levels of confusion and understanding regarding the relationship between particle behavior, measurement, and atomic formation. There is no consensus on how Heisenberg's Uncertainty Principle specifically affects the formation of atoms.

Contextual Notes

Some participants reference the historical debate between Einstein and Bohr, indicating that the discussion may involve unresolved assumptions about quantum mechanics and measurement. The relationship between decoherence and atomic formation is also mentioned but not fully explored.

Sicewa
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I'm kinda confused about atoms.

Basically when particles came into existence, they were affecting other particles so they were being "seen", which would allow them to have a position so they could come together to form atoms, right? I'm so confused about atoms after learning about Heisenberg's Uncertainty Principle, sorry if this question is stupid.
 
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I have trouble understanding what your question is. However when particles came into existence (after the big bang) there was too much energy around for atoms to form. It took about 380,000 years before things cooled down enough for atoms to form. What is your concern about Heisenberg's principle in this context?
 
Sicewa said:
I'm kinda confused about atoms.

Basically when particles came into existence, they were affecting other particles so they were being "seen", which would allow them to have a position so they could come together to form atoms, right? I'm so confused about atoms after learning about Heisenberg's Uncertainty Principle, sorry if this question is stupid.

No, this is certainly not a stupid question but rather no question at all. When your confusion has leveled you might probably want to try asking again.
 
Sicewa, Heisenberg's principle does not say that you can't measure the position of a particle.
 
Geez after reading what I wrote even I have no idea what the heck I was talking about. Anyway I understand it now, I think, thanks.
 
Even if we bounce a particle off another particle to measure position, the Heisenberg Uncertainty Rule still holds.
 
Sicewa said:
I'm kinda confused about atoms.

Basically when particles came into existence, they were affecting other particles so they were being "seen", which would allow them to have a position so they could come together to form atoms, right? I'm so confused about atoms after learning about Heisenberg's Uncertainty Principle, sorry if this question is stupid.

maybe decoherence, check relevant books and articals.This is really a long story traced back to Einstein and Borh's dispute.Basic ideas is environment degrees of freedom which are orthogonal states entangles with the system to be measured makes the system bahaves like classical esembles of "classical" states.
for all practical purpose,you can just assumpt that a wave function collapes when the relevant quantity is measured. That is to say , the moon come into existence when you watch it.
 

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