Path: ...!local-2.nntp.ord.giganews.com!Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Tue, 11 Jun 2024 20:27:05 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: Quantum mystics Date: Tue, 11 Jun 2024 13:27:04 -0700 Message-ID: <0fch6jh517mno0bfepv2tbsv0emg1to16e@4ax.com> References: <7lre6j5fibf2cht90dkedmftlej4rlmgr6@4ax.com> User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Lines: 62 X-Trace: sv3-GR6lb7oGG+9xGKqRYr4sSflV7jKku2qeJpm2nik0UrqyE5D0NDlQUfPoCzdcmtyKoC9rRUBeklsTysZ!IwM3h+Qr2FTC6IPq9yIHcjpze6jc0Eq3HIEOmza8t/c3xjcDrJBCXRoc3P8B7ij4L5DKAYqtr7df!RkgQVg== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3592 On Tue, 11 Jun 2024 22:06:10 +0200, Jeroen Belleman wrote: >On 6/10/24 23:24, john larkin wrote: >> On Mon, 10 Jun 2024 23:15:51 +0200, Jeroen Belleman >> 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. >> > >Yes, but you'd need to use quite dense stuff to have a good >chance of intercepting it. Lead tungstate is the thing these >days. > >Jeroen Belleman I suspect that a tight spectral resolution (and some gamma lines are a few per cent wide) implies high detection efficiency. Visible light is just too wimpy to get clear quantum detection.