Decoherence references and a question about the measurement problem

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Discussion Overview

The discussion revolves around the topic of decoherence in quantum mechanics, specifically seeking references for understanding both intuitive and mathematical aspects. Additionally, a question is raised about the implications of quantized probabilities on the measurement problem in quantum mechanics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Participants inquire about the best sources for understanding decoherence, with references to Schlosshauer's work being mentioned as a key resource.
  • Some participants suggest that Schlosshauer's book remains a standard reference for the quantum-to-classical transition, while others propose that more comprehensive texts, such as "The Theory of Open Quantum Systems" by Breuer and Petruccione, may be better suited for applications.
  • One participant questions the coherence of a model where probabilities in quantum mechanics are quantized, suggesting that such a model may not exist, which complicates discussions about its implications for the measurement problem.
  • Another participant notes that the idea of quantized probabilities has been encountered in the context of the many-worlds interpretation, particularly in deriving the Born rule.

Areas of Agreement / Disagreement

There is no consensus on the existence of a coherent model for quantized probabilities, and participants express differing views on the adequacy of various references for understanding decoherence.

Contextual Notes

Some participants express uncertainty about the implications of decoherence and the measurement problem, indicating that the discussion is still open to interpretation and further exploration.

msumm21
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TL;DR
Questions on decoherence: references and a
Couple questions here.

1. What do you think is the best source to read about decoherence, both from an intuitive/high level pov, but also with mathematical details. I'd partially read a recommended paper by Schlosshauer a while back, is that still the bible for this?

2. If probabilities in quantum mechanics were themselves quantized (i.e. probabilities couldn't be any real number in [0,1] but had to be an integral multiple a some small number ##\epsilon##), would decoherence then solve the measurement problem? E.g. while interacting with "environments" potential measurement results would eventually have a probability below ##\epsilon## and hence vanish completely. All the probability would shift the single result measured. (Admittedly not sure if this makes sense--I either never got a good grasp of decoherence or I forgot it if I did.)
 
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msumm21 said:
If probabilities in quantum mechanics were themselves quantized (i.e. probabilities couldn't be any real number in [0,1] but had to be an integral multiple a some small number ##\epsilon##)
I'm not sure anyone has ever proposed a coherent model with this property. So I don't know that questions about it are actually answerable since we don't have a model to use to answer them.
 
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msumm21 said:
Summary:: Questions on decoherence: references and a

Couple questions here.

1. What do you think is the best source to read about decoherence, both from an intuitive/high level pov, but also with mathematical details. I'd partially read a recommended paper by Schlosshauer a while back, is that still the bible for this?
Could this book be best suited for your needs?
https://www.springer.com/gp/book/9783540357735
 
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msumm21 said:
Summary:: Questions on decoherence: references and a

I'd partially read a recommended paper by Schlosshauer a while back, is that still the bible for this?
Now the bible is his book that @StevieTNZ linked above.
 
PeterDonis said:
I'm not sure anyone has ever proposed a coherent model with this property.
I've seen it in the many world context, as a technicality that helps to derive the Born rule.
 
msumm21 said:
What do you think is the best source to read about decoherence,...
To start with:
Stephen L. Adler: Why Decoherence has not Solved the Measurement Problem: A Response to P.W. Anderson
https://arxiv.org/abs/quant-ph/0112095v3
 
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msumm21 said:
1. What do you think is the best source to read about decoherence, both from an intuitive/high level pov, but also with mathematical details. I'd partially read a recommended paper by Schlosshauer a while back, is that still the bible for this?
I think Schlosshauer's book is still the standard reference if one wants to learn about how decoherence is related to the quantum-to-classical transition.

Decoherence itself, however, is primarily a physical process in open quantum systems which has measureable consequences. Schlosshauer is only scratching the surface of this. A more comprehensive reference here is "The Theory of Open Quantum Systems" by Breuer and Petruccione.
 
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kith said:
I think Schlosshauer's book is still the standard reference if one wants to learn about how decoherence is related to the quantum-to-classical transition.

Decoherence itself, however, is primarily a physical process in open quantum systems which has measureable consequences. Schlosshauer is only scratching the surface of this. A more comprehensive reference here is "The Theory of Open Quantum Systems" by Breuer and Petruccione.
I would put it this way: Schlosshauer is mainly for foundations, Breuer and Petruccione is mainly for applications.
 
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