Timeline for Is entropy real or just a consequence of the way we choose to examine a physical system?
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15 events
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| Oct 16 at 22:07 | comment | added | Ján Lalinský | @PhilipRoe the quote was about thermodynamics, by Arnold Sommerfeld. eoht.info/page/Arnold%20Sommerfeld | |
| Oct 16 at 21:25 | comment | added | Philip Roe | I regret that I have forgotten the attribution, but I have enjoyed the following; "Entropy is a funny thing. When you first come across it, you don't understand it, but after a while you think you do understand it. A long time later you realize that you don't understand it, but by then you don't care. | |
| Oct 16 at 21:05 | comment | added | Ján Lalinský | @TobiasFünke You can read it here: xdcp.org/pse/questions/831042/… | |
| Oct 16 at 20:52 | comment | added | Tobias Fünke | @JánLalinský Thanks for your effort, much appreciated. I cannot see the physics SE post, but I will look at the other papers. | |
| Oct 16 at 16:39 | comment | added | Ján Lalinský | @TobiasFünke I tried to express my qualms here physics.stackexchange.com/a/831088/31895. There are many papers criticizing Landauer's argument, or physical generality of Landauer's principle, e.g. philsci-archive.pitt.edu/115 , sites.pitt.edu/~jdnorton/papers/Waiting_SHPMP.pdf | |
| Oct 16 at 8:35 | comment | added | Ján Lalinský | @TobiasFünke I've reformulated a bit. I didn't remember the name of the scientist, so I've searched for it now, and I've found a note saying Nernst was against entropy. mprl-series.mpg.de/studies/2/5/index.html | |
| Oct 16 at 8:11 | history | edited | Ján Lalinský | CC BY-SA 4.0 |
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| Oct 16 at 7:36 | comment | added | mdkovachev | @TobiasFünke you are right, I just wanted to know if I was correct in thinking that there are multiple types of entropy stemming from the way we choose to describe a system. I was not satisfied with the typical coin example of micro/macrostates and entropy, since a gas is not made out of pennies, is it? But everything I could find online was just the "entropy is a measure of disorder" definition. So I thought a bit about it and came up with the definitions in my post about micro/macrostates and wanted to check that I was not just making stuff up. | |
| Oct 16 at 6:45 | history | edited | Ján Lalinský | CC BY-SA 4.0 |
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| Oct 16 at 6:09 | comment | added | Tobias Fünke | ...sorry, but one more point and question, regarding your last paragraph. I think which macrovariables we use should be determined by the experimental constraints: namely what we can measure and control. Anyway: Do you have a nice reference for the critique about Landauer's principle? Or what exactly do you mean? Thanks in advance. | |
| Oct 16 at 6:02 | comment | added | Tobias Fünke | +1. Do you by chance remember the name of the "anti-entropy" person? --- Regarding your first paragraph: I think OP did not intend to say that entropy was not well-defined or arbitrary. I think they just correctly noticed that to one physical system, there correspond many thermodynamical systems/descriptions, so to say, and depending on what description we take (say, what kind of macrovariables), we have to use different entropy functions and can assign different entropy values.-- A point Jaynes made clear over and over again. | |
| Oct 16 at 0:35 | history | edited | Ján Lalinský | CC BY-SA 4.0 |
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| Oct 16 at 0:28 | history | edited | Ján Lalinský | CC BY-SA 4.0 |
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| Oct 16 at 0:22 | history | edited | Ján Lalinský | CC BY-SA 4.0 |
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| Oct 16 at 0:12 | history | answered | Ján Lalinský | CC BY-SA 4.0 |