Temporal symmetry solves all quantum paradoxes?

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    Quantum Symmetry
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Discussion Overview

The discussion revolves around the concept of temporal symmetry in quantum mechanics and its implications for understanding quantum paradoxes. Participants explore the relationship between time symmetry and the arrow of time, particularly in the context of entropy and thermodynamic principles.

Discussion Character

  • Debate/contested
  • Exploratory
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants reference Victor J. Stenger's assertion that quantum phenomena are time-symmetrical and do not distinguish between initial and final conditions.
  • Others suggest examining various time-symmetric interpretations of quantum mechanics, noting that they do not assign a preferred direction to time.
  • Concerns are raised about the implications of time symmetry in light of the universe's initial low entropy and the second law of thermodynamics, which suggests a directionality to time on larger scales.
  • One participant questions whether decoherence is responsible for the observed arrow of time, while another argues that systems naturally evolve towards thermodynamic equilibrium.
  • There is speculation about the nature of time if the universe had started in a different state, such as a "broken egg," and how that might affect our perception of time.
  • Some participants express uncertainty about the relationship between spacetime expansion and the macroscopic experience of time, suggesting that an expanding universe may prevent reaching equilibrium.
  • One participant challenges the idea that the arrow of time is solely a consequence of statistical behavior, arguing that the relationship between states A and B in thermodynamics does not imply a temporal order.

Areas of Agreement / Disagreement

Participants express a range of views, with no clear consensus on the implications of temporal symmetry or the nature of the arrow of time. Disagreements exist regarding the interpretation of entropy, the role of decoherence, and the relationship between time and thermodynamic principles.

Contextual Notes

Participants highlight limitations in their arguments, such as the dependence on definitions of entropy and time, and the unresolved nature of certain mathematical and conceptual steps in the discussion.

  • #91
ThomasT said:
However, if the aim is to 'understand' the emergence of complex, time-asymmetric, evolving systems in general, then a time-asymmetric fundamental (wave?) dynamic(s) would seem to be the approach to take, imho.
I know why you believe this conclusion is ''unavoidable'' if you insist upon a fundamental time asymmetric dynamics at the macroscopic scale. But it really isn't: that is all I have to say.
 

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