What is the true nature of reality according to quantum mechanics?

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Discussion Overview

The discussion revolves around the nature of reality as described by quantum mechanics, exploring the philosophical implications and interpretations of quantum theory. Participants examine whether quantum physics provides insights into reality or if it is merely a mathematical framework for predicting outcomes at atomic and subatomic levels.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Philosophical exploration

Main Points Raised

  • Some participants argue that quantum physics is fundamentally a mathematical theory that does not necessarily convey information about "reality" in a philosophical sense.
  • Others suggest that the term "reality" is complex and can vary based on definitions, with some proposing that reality should be left undefined in physics and addressed by philosophy.
  • There is a contention regarding whether quantum mechanics describes reality or merely provides a mathematical description of interactions, with some stating both perspectives can coexist depending on how reality is defined.
  • Some participants highlight that classical physics is also described mathematically, questioning the distinction made between quantum mechanics and classical theories regarding their relation to reality.
  • A few participants introduce philosophical definitions of reality, suggesting that existence can be understood as the capacity to affect the world, while others critique these definitions as overly religious or lacking clarity.
  • Concerns are raised about the implications of quantum mechanics on the concept of realism, particularly regarding the independence of observables from measurements, referencing specific theorems and paradoxes in quantum theory.
  • Participants note that quantum phenomena often do not align with everyday experiences, complicating intuitive understandings of reality.

Areas of Agreement / Disagreement

Participants express a range of views, with no consensus reached on the nature of reality as it relates to quantum mechanics. Disagreements persist regarding the implications of quantum theory for philosophical realism and the interpretation of reality itself.

Contextual Notes

Limitations in the discussion include varying definitions of reality, the philosophical implications of quantum mechanics, and the unresolved nature of how quantum mechanics relates to observable phenomena.

  • #31
votingmachine said:
It is quite nice to have a mental image that reflects ordinary things we already understand. QM really misses the boat on a LOT of that. Things are just incredibly weird, when compared to ordinary macroscopic things. And some things that attempt to be analogous, such as "spin" really don't quite match.
votingmachine said:
QM does tell about reality, but does so in non-intuitive ways, that don't fit our expectations that we generalize from macroscopic experiences.
Ian J Miller said:
there must be something we could consider as real, even if we do not understand it, and our failure to understand surely cannot be a guiding rule for physics. Further, if we take expectation values, following Ehrenfest's theorem, it is surely as real as classical physics.
Most of the weirdness of quantum mechanics comes from the way the math is interpreted - namely by putting far too much emphasis on pure states and Born's rule. With my
thermal interpretation of quantum physics, which works in the Ehrenfest picture of quantum mechanics that treats quantum expectations as real, most weirdness is gone.
 

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