kram1032
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 Aug 31 awarded Scholar Aug 31 accepted Hamilton operator in absence of causal order? Jul 26 revised When can two quantities be added together? addressing concerns for duplicate, going more in-depth - hopefully not too much so Jul 26 asked When can two quantities be added together? Jul 21 comment What is the link between the density matrix and Hestenes' spinors in geometric algebra? Perhaps this paper helps? arxiv.org/pdf/quant-ph/0004031v3.pdf - it covers a lot more than your question but if you just search the document for "density" you should get your answer in various stages of generality. Jun 9 comment Differences between pure/mixed/entangled/separable/superposed states The example "superposed" state should be |0>+|1> rather than |1>+|1>, right? As is, it would not be normalized: its squared norm would be 2 since you could simply add the two same states together. Mar 4 revised Is it possible for a physical object to have a irrational length? made image be alligned with text nicer Mar 4 comment Is it possible for a physical object to have a irrational length? hah thanks, it was a simple render in Blender Cycles. (Look it up if you don't know it. It's neat.) Three refractive bluish spheres, one lightsource in the middle above them in the same location as the camera, if I recall correctly. It's been a while though. - Not exactly related to the question but I felt like being a bit fancy :) Jan 28 comment Is it possible for a physical object to have a irrational length? @Jerry Well, yeah, it is possible to have an object with rational length. You only need to adjust the infinitely accurate scale so that a given length becomes exactly rational. However, if you keep a fixed scale such that one length becomes rational, it should always be possible (to the point where it's trivial) to find a length that is irrational. Jan 27 revised Is it possible for a physical object to have a irrational length? added 32 characters in body Jan 27 comment Is it possible for a physical object to have a irrational length? I think, comming up with a scale like that isn't what the question asks for: Take the right Isosceles triangle in the example. It assumes that you meassure the side-lengths with length 1 and thus, the hypothenuse has to be $/sqrt{2}$. The question essentially is: Given you use an infinitely accurate scale in which one of the sides comes out rational, would, on a physical level, all sides be rational (two of them of miniscully different length) or could two of them possibly be exactly the same, making the third side irrational? (or the third side could be rational and the other two irrational.) Jan 27 revised Is it possible for a physical object to have a irrational length? minor correction Jan 27 awarded Teacher Jan 27 revised Is it possible for a physical object to have a irrational length? additional information; minor correction Jan 27 answered Is it possible for a physical object to have a irrational length? Jan 14 revised What is non-thermal plasma? grammar and formating Jan 14 revised Does high entropy means low symmetry? various grammar and writing style edits Jan 14 awarded Editor Jan 14 revised Does high entropy means low symmetry? accounting for edits of question and formating Jan 14 suggested approved edit on Does high entropy means low symmetry?