Which is harder: classical or quantum physics?

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Discussion Overview

The discussion revolves around the comparative difficulty of classical physics and quantum physics, exploring concepts of dominance, correctness, and the potential for a new category termed "quantassic physics." Participants examine the contexts in which each type of physics may be easier or more applicable, as well as the mathematical challenges associated with both fields.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Mathematical reasoning

Main Points Raised

  • Some participants suggest that classical concepts can be easier to deal with in certain situations.
  • Others argue that quantum physics is dominant at small scales while classical physics prevails at larger scales, indicating that the context and assumptions matter.
  • A participant notes that classical physics often provides a satisfactory explanation, although it may overlook aspects addressed by more advanced theories.
  • One contributor recalls that, after overcoming conceptual hurdles, the mathematics of quantum mechanics seemed easier than that of classical mechanics, attributing this to teaching approaches rather than intrinsic properties of the physics.
  • Another participant highlights that modern classical physics often involves nonlinear phenomena, such as chaos, contrasting with the linear nature of quantum mechanics.
  • A viewpoint is presented that both classical and quantum physics can be equally challenging, depending on individual talents and preferences.

Areas of Agreement / Disagreement

Participants express differing opinions on which type of physics is harder, with no consensus reached. The discussion reflects multiple competing views on the ease of understanding and the mathematical complexity of classical versus quantum physics.

Contextual Notes

Participants acknowledge that the perceived difficulty may depend on various factors, including teaching methods and personal inclinations, but do not resolve the underlying complexities or assumptions involved in each field.

Erdem
which physics is easier?
which physics is dominant?
which physics is correct?

Classic or quantum

or even new one: quantassic physics.
 
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- I suppose classical concepts can be easier to deal with in some cases.

- Quantum is dominant at small size scales, classical at large ones. It depends on the situation and your assumptions.

- Both. Again, it depends what you're talking about. In many cases, classical physics gives a perfectly good picture of what's going on, although it may not take into account aspects that more advanced theories do.

And I have no idea what quantassic physics is.
 
One thing I remember about quantum, once I got over the conceptual hurdle, the math was much easier than the math for classical mechanics. I don't think that is an intrinsic property of the physics involved, but more a decision on the teaching community's part. You can make the coursework as hard as you want, but since students are going to have the conceptual difficulties with quantum, they ease off in the mathematical difficulties.

Njorl
 
Nearly all quantum mechanics is linear, while modern classical physics is into nonlinear stuff like chaos.

Since physics is like puzzles that the community makes up for itself, I think that any theoretical subject becomes as complex as the community can handle and then stops. Then you have to wait for someone like Witten who can handle harder puzzles to show the way forward, or you can "can" a lot of knowledge and go back to simpler reasoning at a higher level, like category theory.

Bottom line on this question, when you really get into them, classical and quantum physics are about equally hard. People's talents and tastes differ. Try to see which one you like to struggle with better, for struggle you will, and you might as well enjoy it.
 

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