eigenket

48 ms·

571.
by eigenket 3y ago
I would say this phrase > the minor decrease in mass that occurs during the formation of a water molecule due to the conversion of some mass into binding energy according to Einstein's equation E=mc^2 Is highly imprecise at best, a
572.
by eigenket 3y ago
PDF is not a bad standard, the priorities of the people producing scientific papers as pdfs are just not the same as your priorities.
573.
by eigenket 3y ago
HTLM may be the standard for many things, but it is not the standard for academic papers. PDF is the standard. PDF is the optimal format for this use-case, mostly because of existing tooling which makes it very easy to make academic papers
574.
by eigenket 3y ago
Its not exactly the same situation but I'm from the UK and live in Poland (because I'm a scientist and brexit happened). An enormous number of Polish people left to work all over Europe and the world since the end of communism, an
575.
by eigenket 3y ago
Deepmind was literally founded in the UK and is headquartered in London. Comercially supported research is (in my opinion) relatively OK in Europe, its just that the big US tech companies are so big they'll just buy you if you do somet
576.
by eigenket 3y ago
According to the OECD ( https://stats.oecd.org/Index.aspx?DataSetCode=SHA# ) the US spends about 18% of its GDP on healthcare while the UK spends about 12% of its (much lower per capita) GDP. Per captia the numbers are even m
577.
by eigenket 3y ago
It strongly depends on where you are - someone earning £50k in probably London is having a much better time than someone earning $50k in Silicon Valley, but if the $50k person is living in somewhere less ridiculous they might be better off.
578.
by eigenket 3y ago
Any explanation I can give in a comment here will be pretty flawed, if you want more detail than my previous comment I think your best bet is to read the papers at the arxiv links I posted above.
579.
by eigenket 3y ago
yes, specifically doing things without complex numbers breaks if you require composing systems to work like they do in normal quantum mechanics (composing with the tensor product). If you drop that assumption about how things compose then y
580.
by eigenket 4y ago
This is your regularly scheduled reminder that the author of these papers ( https://arxiv.org/abs/2101.10873 , https://arxiv.org/abs/2111.15128 ), which this article is based on know very well that c
581.
by eigenket 4y ago
Quantum interpretations all generally predict the same stuff (or very close to the same stuff) that "normal" quantum mechanics does. If you have something which has substantially different predictions then it isn't really an
582.
by eigenket 4y ago
The cost is two classical bits and one entangled Bell pair to teleport a qubit. You make the Bell pair, send one half of it to Alice (who wants to transmit the qubit) and one half to Bob (who wants to receive it). Alice then does a Bell bas
583.
by eigenket 4y ago
nope
584.
by eigenket 4y ago
While I disagree (quite strongly) with the claim that non-locality is a problem with QM (on the contrary it seems like an extremely interesting and useful property), I would like to know why you think this paper has anything specifically in
585.
by eigenket 4y ago
Essentially every paper in quantum info and foundations is posted on arxiv first before being submitted to a journal for publication https://arxiv.org/abs/2204.05385 just search for the paper name with the word arxiv a
586.
by eigenket 4y ago
Detecting Bell-nonlocality requires two parties doing measurements on separated systems. Contextuality (in the formulation used here) is detected by measuring two out of a possible five measurements on a single particle. Quantum mechanics s
587.
by eigenket 4y ago
Superdense coding specifically is unlikely to ever be practically relevant. Even for people quite optimistic about the future of quantum computing it is hard to imagine a scenario where a single qubit will be cheaper than two classical bits
588.
by eigenket 4y ago
The no-communication theorem [1] fairly comprehensively rules out any attempt to send messages faster than light using quantum theory. It essentially says that in order to send any message using quantum mechanics you also have either physic
589.
by eigenket 4y ago
Theres nothing massively wrong with it, it's a perfectly plausible model. The one thing that isn't particularly nice is that spheres have intrinsic curvature, essentially if you draw two parallel lines on a sphere they will eventu
590.
by eigenket 4y ago
There are some reasons why cosmologists don't like the idea of a universe that loops back on itself, one is that such a universe can't be both isotropic (the same in every direction) and homogeneous (the same at every point) [edit
591.
by eigenket 4y ago
Yeah, ideas like this are usually called "tired light" models, they have been extensively explored for the last hundred years or so. A lot of these models have been shown to be false by experiments, but I guess if you try you can
592.
by eigenket 4y ago
Thanks for this comment. I think I started in this comment section trying to say something like this, but said it in a bad way, and then got progressively more confused and less clear in my responses as the day went on. This is much more cl
593.
by eigenket 4y ago
You seem to be confusing the mathematical definition of matrix multiplication with an explicit algorithm to compute it. The wiki page you linked is almost entirely about the abstract mathematical definition and talks about algorithms only f
594.
by eigenket 4y ago
I am arguing that a matrix multiplication algorithm, like essentially any other numerical algorithm, consists of (at least) the following two parts 1. The actual steps you have to follow. 2. Some form of error bounds/analysis that tell
595.
by eigenket 4y ago
An algorithm for "matrix multiplication" that assumes infinite precision arithmetic is used is essentially useless (there are some niche uses for matrices with entries in finite fields/rings). An algorithm for matrix multipli
596.
by eigenket 4y ago
"Correct" means different things in different contexts. In a fairly standard application of matrix multiplication you don't multiply matrices A and B to get AB, instead you have some floating point approximation to A, and s
597.
by eigenket 4y ago
Minor correction, but actually classical paths make the action stationary, they don't minimize it. All minima are stationary points but not all stationary points are minima. Sometimes the classical path maximises the action, and someti
598.
by eigenket 5y ago
IMO the only stuff a student "should have learned" is stuff that they can't get onto the course without knowing. Allowing someone onto the course, for which "x" is a prerequisite, who doesn't know "x"
599.
by eigenket 5y ago
So the 75%+ who don't pass this course don't graduate or what? They have to change degree?
600.
by eigenket 5y ago
Maybe I'm massively out of touch but I'm pretty sure a good teacher could teach that stuff to almost anyone. Like this stuff isn't particularly complicated, I'm not a very good teacher but I did teach some undergrad semi

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