danieltanfh95's latest activity
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danieltanfh95 reacted to QuarkyMeson's post in the thread Seeking clarity on the physical definition of an observer with
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I agree more or less, but that was essentially my point. The proposed definition of observer is excessively broad. If an SR-observer is... -
danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.My reading had been that this is derivation from cited premises, in the same category as applying Noether's theorem to a specific...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.The statement above embeds three mischaracterizations worth addressing individually. "Admission" mischaracterizes my statement. That...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.I cannot provide a single-line quotation because the two halves sit in separate literatures. The decoherence programme (Zurek, Wallace...
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danieltanfh95 replied to the thread Graduate How valid is the indivisible interpretation of quantum mechanics?.Projection to any configuration space produces the non-Markovianity, particles or fields. Barandes uses particle configurations, so I...
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danieltanfh95 replied to the thread Undergrad "The wavefunction never collapses".While the blog presents a defensible summary of Zurek, its framing is misleading since the package is really a restatement of the same...
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danieltanfh95 replied to the thread Graduate How valid is the indivisible interpretation of quantum mechanics?.No. For example, Bohmian QFT (Struyve-Westman or Dürr-Goldstein-Tumulka-Zanghì) constructs stochastic processes where field...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.The aggregate fermion-number current is the Dirac current for many-body fermionic systems. Single-particle Dirac current is the special...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.Photodetectors are fermionic. Detection happens via electrons transitioning in silicon or being freed from a photocathode. A many-body...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer."Branches always present" only requires unitary evolution plus that the Dirac matter field is physical. That's shared by MWI, Bohmian...
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danieltanfh95 replied to the thread Undergrad "The wavefunction never collapses".The wavefunction doesn't "collapse", instead the observer's Dirac current (the physical matter current) becomes entangled with the...
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danieltanfh95 replied to the thread Seeking clarity on the physical definition of an observer.1. observer = anything that can provide a frame of reference sitting in spacetime (more precisely, anything with a well-defined...
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danieltanfh95 replied to the thread Graduate How valid is the indivisible interpretation of quantum mechanics?.The Schrödinger picture in QFT is Lorentz-covariant. Tomonaga (1946) and Schwinger (1948) generalized the functional Schrödinger...
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danieltanfh95 replied to the thread Graduate How valid is the indivisible interpretation of quantum mechanics?.Perhaps there was a misunderstanding. I wasn't claiming that mathematical objects are reality. I was noting that since waves and...
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danieltanfh95 replied to the thread Graduate How valid is the indivisible interpretation of quantum mechanics?.Theories of physics study physical invariants in reality. There has to be some mapping between the mathematical objects a theory uses...