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From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: Quantum mystics
Date: Mon, 10 Jun 2024 14:24:39 -0700
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On Mon, 10 Jun 2024 23:15:51 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:

>On 6/10/24 20:26, Phil Hobbs wrote:
>
>[Snip...]
>
>> 
>> Sticking with the semiclassical picture of photodetection is good, because
>> it avoids almost all of the blunders made by the photons-as-billiard-balls
>> folk, but it doesn’t get you out of the mystery.
>> 
>> The really mysterious thing about photodetection is that a given photon (*)
>> 
>> incident on a large lossless detector gives rise to exactly one detection
>> event, with probability spatialy and temporally weighted by E**2.
>> 
>> Doesn’t seem so bad yet, but consider this:
>> If the detector is large compared with the pulse width/c, distant points on
>> the detector are separated by a spacelike interval.
>> 
>> That means that so when point A detects it, there is no way for the
>> information reach point B before the end of the pulse, when E drops to
>> zero, and yet experimentally point B doesn’t detect it.
>> 
>> (*) a quantized excitation of a harmonic oscillator mode of the EM field in
>> a given set of boundary conditions)
>> 
>> Cheers
>> 
>> Phil Hobbs
>
>We don't have single-photon-on-demand sources, nor perfect detectors.
>Both sources and detectors are probabilistic. I'd like to see how
>this argument fares using energy resolving detectors like TESs.
>
>I do not expect the probability of a detection event in one spot to
>be affected instantly by a detection event somewhere else. The
>collapse of the wave function is an attempt to apply statistical
>reasoning to a single event.
>
>Jeroen Belleman

Higher energy photons, like gamma rays, can be detected with 100%
probability. They pack a lot of energy.