Quantum systems without a classical limit

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Discussion Overview

The discussion revolves around the concept of "quantum systems without a classical limit," with participants seeking examples and clarification on the meaning of this term. The scope includes theoretical considerations and interpretations within quantum mechanics.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant inquires about examples of quantum systems that lack a classical limit.
  • Another participant questions the absence of examples in the literature referenced by the first poster.
  • A suggestion is made that spin one-half or a system of coupled spin one-halfs could serve as examples of such quantum systems.
  • A different perspective is offered, stating that a white dwarf star may not represent a classical limit, yet it can transition to a classical type Ia supernova under certain conditions.

Areas of Agreement / Disagreement

The discussion reflects multiple competing views regarding the definition and examples of quantum systems without a classical limit, and it remains unresolved.

Contextual Notes

There is ambiguity regarding the definition of "classical limit," and the examples provided depend on interpretations that may not be universally accepted.

wdlang
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in the literature, people are talking about 'quantum systems without a classical limit'

could anyone give me an example?
 
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There are no examples given in "the literature" that you read?

Zz.
 
Spin one-half. Or a system of coupled spin one-halfs.
 
I'm not sure what is meant by "no classical limit." A white dwarf star in a sense is not a classical limit, even though it is a huge number of particles, but if you heat it up high enough it would explode and be a very classical type Ia supernova.
 

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