Lateral Wiki – A Digital Garden

Note: These are very loose notes and need cleaning. Scribbled down as many terms as I came over when I used Roam Research.

Terms

  • [[Action at a Distance]]
    - Good explanation also of fields [QFT: What is the universe really made of? Quantum Field Theory visualized - YouTube](https://www.youtube.com/watch?v=jlEovwE1oHI) [[../_meta/meta.source.web]]
- [[Bell's Inequality]]
- certain measurements are truly probabilistic and not predetermined by some hidden variables.
    - source:: [(2) Assuming that the Big Crunch/Big Bounce theory is true would that mean that the universe plays out exactly the same an infinite amount of times? : cosmology](https://www.reddit.com/r/cosmology/comments/jl8gh3/assuming_that_the_big_crunchbig_bounce_theory_is/)
    - my point was showing there exist some truly random processes in the universe
        - how is what happens randomly determined to become exactly that value? How can there not be #determinism ?
    - I don't know if you're interested,  but this might be some good reading to start getting a little grasp on the notion of "randomness":
        - - Earman, J. (1986). A Primer on Determinism. (particularly Ch. 8.) #science #[[Quantum Mechanics]] #book
        - - Kolmogorov, A. N. & Uspenskii, V. A. (1988). Algorithms and Randomness. #science #[[Quantum Mechanics]] #book
        - - Eagle, A. (2005). Randomness is Unpredictability. #science #[[Quantum Mechanics]] #book
- [[Bell's Theorem]]
- Bell's theorem is commonly understood to rule out "local deterministic
    hidden variable theories", or, more generally, "local causality". Thus, Bell's theorem is often understood to imply that QM is "[[nonlocal]]", or in Bell's words: QM has a "grossly non-local character" (1964 paper).
        - QM has a "grossly non-local character" (1964 paper).
    quote:: Bell #[[Quantum Mechanics]]
- [[Eigenstate-Eigenvalue Link]]
- Global phase invariance
- [[Locality]] - things effect each other only when they are in the same place
- Exception is #Gravity, until we find the gravity-carrying particle, or gravitational fields are real.
- [[Many Worlds Interpretation]]
- evades [[Bell's Inequality]]
    - source:: https://www.reddit.com/r/cosmology/comments/jl8gh3/assuming_that_the_big_crunchbig_bounce_theory_is/
- [[Projection Postulate]] aka [[collapse of the wave-function]]
- by [[Von Neumann]]
- [[Poincare Recurrence Theorem]]
- [[Quantum Field Theory]]
- Good explanation: [QFT: What is the universe really made of? Quantum Field Theory visualized - YouTube](https://www.youtube.com/watch?v=jlEovwE1oHI) [[../_meta/meta.source.web]]
- [[Retrocausality]]
- backwards causation
    - source:: https://www.reddit.com/r/cosmology/comments/jl8gh3/assuming_that_the_big_crunchbig_bounce_theory_is/
- [[Schrödinger]]
- [[Superdeterminism]]
- denying measurement inputs to be free variables
    - source:: https://www.reddit.com/r/cosmology/comments/jl8gh3/assuming_that_the_big_crunchbig_bounce_theory_is/
- [[Superliminal signalling]]
- violating relativistic constraints
    - source:: https://www.reddit.com/r/cosmology/comments/jl8gh3/assuming_that_the_big_crunchbig_bounce_theory_is/

  • quote:: (and anecdotes)

    - Schrödinger meant his cat was an absurdity - [[Quantum Mechanics]] was absurd, he felt
- Dirac said - but not out loud - [[Quantum Mechanics]] is a provisional theory #quote
    (according to [[Roger Penrose]] in https://www.youtube.com/watch?v=hXgqik6HXc0 at ca. 12mins) - also in "[[Roger Penrose]] on Lex Friedman podcast 85 #Physics #consciousness"
    - "The lesson of quantum mechanics and even of classical physics, Popper said, is that nothing is determined, nothing is certain, nothing is completely predictable; there are only “propensities” for certain things to occur. - [[Karl Popper]], Propensities #quote #Physics #uncertainty #[[Quantum Mechanics]] #philosophy #[[philosophy of science]]"

Quotes

Related:

Referred in

Quantum Mechanics