Fora de Pauta

Carta aberta aos espiritualistas e mediuns:

Por Qual Razao Teorias Nascem em Arvores (e as arveres semos nozes)

http://backreaction.blogspot.com/2019/08/the-problem-with-quantum-measurements.html

Continuacao de ontem, 9o paragrafo, conclusao: o Measurement Postulate esta errado.

(Esperem um pouquinho mais, o assunto vai ficar muito, muito melhor!)

10o e 11o paragrafos:
Now, the collapse together with the Schrödinger equation describes what we observe. But the detector is of course also made of particles and therefore itself obeys the Schrödinger equation. So if quantum mechanics is fundamental, we should be able to calculate what happens during measurement using the Schrödinger equation alone. We should not need a second postulate.

The measurement problem, then, is that the collapse of the wave-function is incompatible with the Schrödinger equation. It isn’t merely that we do not know how to derive it from the Schrödinger equation, it’s that it actually contradicts the Schrödinger equation. The easiest way to see this is to note that the Schrödinger equation is linear while the measurement process is non-linear. This strongly suggests that the measurement is an effective description of some underlying non-linear process, something we haven’t yet figured out.

O que ainda “nao descobrimos” eh a funcao Logical OR no campo Higgs local. Ele eh a razao que, por exemplo, um medium reage 5 segundos adiantado a uma vibracao que uma pessoa sequer SABE que vai pensar. Quanto aa equacao, ela absolutamente NAO me interessa: uma equacao de movimento nao se torna magicamente em uma equacao processual do verbo “saber”, eh impossivel. E ela nao me interessa por outra razao mais terminante ainda: eu nao estou falando de ciencia. Estou falando de minha lingua.

12o paragrafo:
There is another problem. As an instantaneous process, wave-function collapse doesn’t fit together with the speed of light limit in Special Relativity. This is the “spooky action” that irked Einstein so much about quantum mechanics.

Nao entendi o problema pois ja sou mais rapido que a Luz, no entanto… a funcao Logical OR nao eh parte da particula mas sim do campo Higgs local. O colapso acontece com a onda inteirinha simultaneamente depois da deteccao da “particula”: se ha deteccao, o que mais eh pra acontecer com o campo, esperar pra computar *serialmente*?

13o paragrafo:
This incompatibility with Special Relativity, however, has (by assumption) no observable consequences, so you can try and convince yourself it’s philosophically permissible (and good luck with that). But the problem comes back to haunt you when you ask what happens with the mass (and energy) of a particle when its wave-function collapses. You’ll notice then that the instantaneous jump screws up General Relativity. (And for this quantum gravitational effects shouldn’t play a role, so mumbling “string theory” doesn’t help.) This issue is still unobservable in practice, all right, but now it’s observable in principle.

Segunda sentenca: ja cobri o assunto nos paragrafos previos. Ultima sentenca: nao observavel pra quem?

14 paragrafo:
One way to deal with the measurement problem is to argue that the wave-function does not describe a real object, but only encodes knowledge, and that probabilities should not be interpreted as frequencies of occurrence, but instead as statements of our confidence. This is what’s known as a “Psi-epistemic” interpretation of quantum mechanics, as opposed to the “Psi-ontic” ones in which the wave-function is a real thing.

Primeira sentenca: EU nao tenho problema com colapso de onda. E eh aqui que o assunto fica pra la de bom!

A continuar.