Path: ...!feed.opticnetworks.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Martin Brown <'''newspam'''@nonad.co.uk> Newsgroups: sci.electronics.design Subject: Re: Quantum mystics Date: Tue, 11 Jun 2024 09:01:45 +0100 Organization: A noiseless patient Spider Lines: 43 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Tue, 11 Jun 2024 10:01:46 +0200 (CEST) Injection-Info: dont-email.me; posting-host="660613d97941c6546877f646149dd90e"; logging-data="1013836"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+2pkfv+9LgpmhFEGTF+AJNNSC5QwABLrh63o/gncvP9g==" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:UguIf7lDUNqkyYkx/INW3jlIkDI= Content-Language: en-GB In-Reply-To: Bytes: 3063 On 10/06/2024 22:43, Jeroen Belleman wrote: > On 6/10/24 19:03, Martin Brown wrote: >> Experimentally it is quite a tour de force! >> >> Physical intuition tends to break down when you have a superposition >> of quantum states involved. Attempting to know which slit a particle >> actually went through destroys the interference pattern and >> experiments using ultra low flux levels with just a single photon in >> at any one time still show a diffraction pattern. QM is decidedly >> counter intuitive. >> >> Explores all available paths mathematics gets the right results but I >> can't help feeling that there is a way to avoid the action at a >> distance implied by quantum entanglement when we get all of the >> physics correct. >> >> I didn't think his talk was all that outrageous. A bit over simplified >> perhaps but then avoiding almost all of the maths that is inevitable. >> > > Over-simplified to the point of being devoid of meaning, indeed. That is the problem with popular science lectures about QM. This one - a Nobel prize lecture by Serge Heroche from 2012 is a lot more meaty and the experimental techniques they used and perfected are breathtakingly cunning. The audience has quite a few famous physicists in it. He is wonderfully self effacing and shares the credit for the success of his experiments very generously with his co-winner many collaborators, his team and graduate students. Non destructive sensing of single atom quantum states is incredibly impressive! I didn't know until I saw that talk that the Schrodinger's cat wavefunction has been experimentally verified. Basically he has constructed a real life particle in a box experiment! It took ultracold superconducting hyper polished mirrors to realise it. -- Martin Brown