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> Shannon entropy, Von Neumann entropy and other information theory entropies are useful, but not physically fundamental... I have to disagree, especially give
by dvt 7y ago
> Shannon entropy, Von Neumann entropy and other information theory entropies are useful, but not physically fundamental...
I have to disagree, especially given that one of the great mysteries of our generation (the Black Hole Information Paradox) hinges on what happens to information -- sure, it's information about particles, whatever that might mean. But Jacob Bekenstein (among others) argues that Thermodynamic entropy is analogous to information (Shannon) entropy[1].
[1] http://webhome.phy.duke.edu/~mkruse/Phy255/255S06_Joyce_Coppock_bh.pdf http://webhome.phy.duke.edu/~mkruse/Phy255/255S06_Joyce_Copp...
- dr_dshiv 7y agoBut, analogous?
- hcs 7y agoI take your point, it might have been interesting to talk about how a lot of relativity and quantum mechanics can be thought of in terms of propagation and destruction of information. And for many students, talking about codes is a lot more interesting than pressure gradients in ideal gasses. A missed opportunity, perhaps.
- kgwgk 7y agohttp://backreaction.blogspot.com/2019/08/how-do-black-holes-destroy-information.html http://backreaction.blogspot.com/2019/08/how-do-black-holes-... “As you have probably noticed, I didn’t say anything about information. That’s because really the reference to information in “black hole information loss” is entirely unnecessary and just causes confusion. The problem of black hole “information loss” really has nothing to do with just exactly what you mean by information. It’s just a term that loosely speaking says you can’t tell from the final state what was the exact initial state.“
- abdullahkhalids 7y agoThis is not the consensus opinion in the physics community. Many physicists consider information as fundamental to this "paradox".
- kgwgk 7y agoRight. The other view isn’t the consensus either. I was just presenting an alternative exposition.