tag:blogger.com,1999:blog-5921695128788196336.post1188377369464112538..comments2020-03-27T10:44:05.207-07:00Comments on Wonders of Physics: Common Myths About Quantum PhysicsUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5921695128788196336.post-15935810602922220292020-03-22T09:21:18.220-07:002020-03-22T09:21:18.220-07:00"...as he didn’t accept the concept of nonloc..."...as he didn’t accept the concept of nonlocality. Later, experiments on entanglement and violation of Bell’s theorem proved him wrong and showed the absence of hidden variables."<br /><br />1.This passage is not logical in itself isn't it? If the problem that Einstein had was with nonlocality, how could the demonstration of the impossibility of hidden variables prove him to be wrong?<br /><br />2. Einstein indeed had problems with nonlocality as can be seen, for instance, from the original EPR paper (http://www.drchinese.com/David/EPR.pdf). But it is wrong that the violation of the Bell's inequalities means the absence of hidden variables. In fact what the violation means is that our world is nonlocal (so yes, Einstein was wrong). The nicest discussion of that can be found in the book of Tim Maudlin (https://www.amazon.com/Quantum-Non-Locality-Relativity-Metaphysical-Intimations/dp/1444331272). <br />There are plenty of papers, where the mentioned mistake of the author of this post is thoroughly discussed. See e.g. page 4 of https://www.mathematik.uni-muenchen.de/~bohmmech/BohmHome/files/bbt.pdf <br /><br />3."When an object interacts too much with its environment and becomes too large, it is no longer a quantum object." <br /><br />This is a wrong sentence. Serge Haroche experimentally demonstrated the process of decoherence. Although decoherence suppresses interference it cannot destroy superposition. The latter is guaranteed by the linearity of the Schrödinger equation. The corresponding discussion can be found e.g. in https://www.sciencedirect.com/science/article/pii/S1355219802000862. <br /><br /> Serj Aristarhov, LMU Munichnoreply@blogger.comtag:blogger.com,1999:blog-5921695128788196336.post-48081019781960871842020-03-22T07:47:36.492-07:002020-03-22T07:47:36.492-07:00Yet another intellectually embarrassing article wr...Yet another intellectually embarrassing article written by a practicing physicist. <br /><br />"Later, experiments on entanglement and violation of Bell’s theorem proved him [Einstein] wrong and showed the absence of hidden variables."<br /><br />Surprised and ashamed that something like this is being perpetuated in 2020. <br /><br />How about doing some serious homework on the foundations of QM before writing. The accessible book by Travis Norsen "Foundations of Quantum Mechanics: An Exploration of the Physical Meaning of Quantum Theory" could be, for example, a starting point.<br /><br />Siddhant Das, LMU Munichhttps://www.blogger.com/profile/05863041123287808345noreply@blogger.com