hello?

6? (x, y, z, rx, ry, rz)

Well, with practical examples it's so much easier to understand and imagine :)

6N?

:thumbs up:

Umm, if I set 0, 0, 0 to be the position of one of the pictures, the others will get a 0, 0, 0 position and overlap? Something is wrrong :D

So if I have a picture at 3, 0, 0 and another one at 5, 0, 0 then the length of the rod is 2?

oks

I just use the formula?

oks

question

All points must be at an equal distance of each other, since the length of the rod is constant, isn't it?

All pictures

Yes but you have many rods, are they with an equal length?

what does finite mean?

oks

o specifying the (x,y,z) of one will automatically specify the (x',y',z') of another

that sentence makes no sense to me sorry ;\

I would

It would be on a circle with radius the length of the rod?

You have specified the position of the first picture, thats it?

1, 2, 3

You haven't?

where?

Ohhh.

I thought I meant with numbers.

With example numbers.

Ok I got it now.

I got it, sorry

Im stupid sometimes...

by degrees you mean parameters?

Got it.

Yep

Why? I mean, each picture would still have it's own pos and rot?

Yes, if you know the rod's length, the pos of the first pic and the rot of the first pic.

Ok, clear.

Agreed.

w.r.t?

Yes but you talked about reduced degrees of freedom?

did y'all hear about the data from the MiniBooNE experiment at Fermilab? Their data is pointing to a fourth flavor of neutrino (though obviously not enough data yet for conclusive proof)

quantamagazine.org/…

Ok got it.

ok

Hey people. I have got a question in mind does more entropy always make the system of concern more disordered!

@Blue The velocity of each of the pictures?

Well, by just knowing the pos and rot of each of the pictures, I cannot know the velocity nor angular velocity of any of the pictures?

youtu.be/vSgPRj207uE I am particularly interested in the simulation done in this video. The system gets more ordered with more entropy.

I know that @Blue

@Blue isn't the whole system of pictures have one velocity and one angular velocity?

They are connected by rods?

@Blue Hey.

We will have different results with different pictures being connected with rods?

Ok, got it. What's next?

@Blue Have you watched the simulation in the video I shared the link of?

@heather A 1eV sterile neutrino sounds interesting. I wonder what we can do with it...?

Just watch it. It's very interesting. The system gets more ordered (as in the common way of thinking) with more entropy.

@vzn see quantamagazine link above, paradigm shift $^{TM}$ may have a humble origin

@Blue I can find them, using V = d/t for each picture?

@Secret that's kind of the question, isn't it? It's not heavy enough to say it's dark matter. in the words of I.I. Ravi, I think: "Who ordered that?" but then again, probably not enough data to conclusively say they exist.

here is the relevant paper for those who are interested.

I forgot what was to 'take the derivative' but yes, I understand what you are saying :)

By putting d, you mean delta?

I honestly get fed up with experimental error keep crushing interesting results, even though it is morally correct for that to happen because the alternative is to be trapped in delusions

Yes, but I have forgotten most of derivatives, or at least I didn't learn them right.

@heather "A standard two-neutrino model is assumed for the MiniBooNE oscillation fits." Um... Why?

@NovaliumCompany if you want a good review, try 3blue1brown's videos, quite good and quick.

Ok then. Anything else I should know except derivatives?

@Mithrandir24601 i dunno what that even means or why it's a problem =P would you mind explaining?

@Mithrandir24601 I thought neutrino mixing need all 3 neutrinos? (but then I vaguely recall the $\theta_{13}$ mixing angle is very tiny)

@NovaliumCompany see ^

Ok. @Blue Thanks so much for teaching me, I'll learn derivatives and be back :)

@heather I'll give it a look :)

See you @Blue :)

@heather There are 3 flavours of neutrinos (excluding this sterile one), not 2. On the other hand, if it's a relatively large mass, the oscillations between the others would be quite small, so maybe it's small enough to be ignored?

@Mithrandir24601 oh, wait, i think i know why: they were shooting a muon neutrino beam, and they were oscillating into electron neutrinos, so tau neutrinos weren't involved.

would that make sense?

@Secret Not at all - you can still get oscillations between 2 flavours, although I certainly wouldn't go around assuming that oscillations only ever occur between 2 flavours either, hence my question

@heather Ahhhh!! Yeah, that's it, thanks :)

@Mithrandir24601 so muon neutrinos can't oscillate into tau? or we can't detect tau neutrinos in the same way?

@heather Although depending, it's not impossible to get tau neutrinos involved as well, but "there were only 2 flavours in the experiment" is good enough for now, considering I'm about to head out soon

ah, well then. i actually listened to a presentation on neutrino research the other day (in an odd twist of fate) so this is rather timely.

our school's physics club took a trip to the nearest university's physics department =D

@Blue That is the dream :D

I wonder if the contribution mu->tau->electron is insignificant enough to assume the 2 flavour oscillation model, probably this one is a higher order process than a direct oscillation between two flavours

hmm, yeah. i might ask that question on the main site...

@Mithrandir24601 i asked a question on the subject of the 2-neutrino model, so hopefully that'll answer this problem.

@Secret nice article, thx for tip, there are other "small" )( discrepancies with the standard model, it would be nice to see a broad survey, have misc collected links myself & need to write them up at some pt. as for paradigm shifts aka scientific earthquakes, my feeling is the Big One is away from a particle-centric pov of the universe toward a soliton model, many (now mostly disconnected) researchers are now independently taking tentative-to-bold steps in that direction.

btw, what does ")(" mean?

its an emoticon variant for iota with other meanings :)

some hardcore physicist believers will argue that standard model discrepancies are all ")(". a contrarian would argue some will turn out to be not so ")(". neutrinos are very ")(" but could turn out to have significance far greater than very ")(" as the article lays out o_O :P

I do not understand the above sentence as the ")(" seemed to have 4 different meanings at least

lol emoticons can be like that try not to get triggered (reminder, its a chat line) :) :P

(picture the human conversational gesture of two fingers held together closely but not touching) :)

oh hey, i just broke 6k rep on physics.

huh, i didn't realize i was that close. i need to hang around physics more often.

@heather You sure do ;)

i'll probably have more time now that it's summer, so that's nice.

@Blue lol de broglie 1924, nobel prize en.wikipedia.org/wiki/Matter_wave

what's the best stackexchange for questions regarding programming finite element/finite difference methods?

os

@georg You're probably looking for Computational Science

So I just discovered that Persian ice cream made with rice milk, vanilla, rose water and mango = food heaven :)

@Blue Yeah - I thought you have that in India as well?

@Blue taste, maybe not, but I can smell it and smell does add to the flavour

@Blue Now you're the one missing out :P

@Blue its still true 1 century later. + figured you would say that

@Blue maybe study so-called "matter waves" more then :)

← lol, sarcasm? sometimes weary of certain so-called "debates" on here... and who has "strategies" / is "escaping"?

@Mithrandir24601 I'm currently eating mint choc chip icecream, and it's pretty good :-)

@JohnRennie Nah, it's not the same :P One advantage of not being able to have milk is that vegan ice creams tend to be made to a much higher quality than your average, run-of-the-mill non-vegan ice creams, so taste much nicer :P

That's what the icecream followed :-)

← sig other demands coldstone creamery, like dairy queen softserve myself, slowly turning into relationship-killing incompatibility (among "other" things) o_O

i personally think some chocolate gelato rules above all.

@heather As usual, it's something or other to do with atmospheric neutrinos (atmospheric B meson mixing is also where the CP violation comes from if memory serves me correctly)

i also had some butterbeer flavored gelato once, which was pretty darn good.

@JohnRennie English sausages = meh

@Mithrandir24601 them darn atmospheric neutrinos ;) i'll look it up.

@heather Whaaaat?

@Mithrandir24601 Wild boar and apple!!

mmm, pistachio flavored icecream :)

@Mithrandir24601 Whaaaat what?

@JohnRennie OK, that does sound delicious

i mean like harry potter butterbeer, to be clear, not buttery alcoholic beverages

which sounds just plain weird, but anyway.

@heather Yeah, but I've never even seen butterbeer, nevermind butterbeer flavoured this or that

@Mithrandir24601 really? i saw bottles of butterbeer in a specialty candy shop the other day, and bertie bott's every flavor beans, and chocolate frogs.

maybe the midwest is just better at these things =P

@heather ... That's the USA for you...

to be fair, the gelato tasted pretty much like butterscotch, but.

@heather Yep. Maybe I'll try some when I finally get to visit America in whenever that will be (within a couple of years, definitely)

IIRC butterbeer is butterscotch flavoured

i didn't know what it was supposed to taste like.

@JohnRennie Isn't that cheating slightly?

@Blue !?!?

@Mithrandir24601 huh?

@heather the univ physics trip sounds cool which university? were they doing any experiments?

@JohnRennie There's no point in inventing a new beverage, only to have it taste just like an already existing one

ah, here we go:

> J.K. Rowling said in her interview to Bon Appétit magazine that she imagines it "to taste a little bit like less-sickly butterscotch"

according to wikipedia.

also:

> The earliest reference to buttered beer is from The Good Huswifes Handmaide for the Kitchin, published in London in 1588. It was made from beer, sugar, eggs, nutmeg, cloves and butter. Another old recipe for buttered beer, published by Robert May in 1664 from his recipe book The Accomplisht Cook, calls for liquorice root and aniseed to be added.

@heather That sounds like a different variety of butterscotch, not a new thing altogether

@Mithrandir24601 true, but it also has a "warming effect" whether served hot or cold, again according to wikipedia.

@vzn iowa state university; we got to see a lab where they were doing some laser spectroscopy experiments, so yes. the other two "talks" we saw were theoretical.

@heather Wouldn't that be achieved by adding a bit of alcohol? (or, if you feel so inclined, ginger)

@Mithrandir24601 well, in harry potter it is very mildly alcoholic, so there you go. not enough to get wizards tipsy, though, just house-elves.

@heather cool, so do you have some inclination for future directions in college? physics vs engr etc?

@vzn i'm leaning more physics currently, but experimental physics. electrical engineering and aerospace engineering are cool too.

@heather So... It's butterscotch liqueur, only with less alcohol?

@heather had some ideas/ inspiration for a photon experiment recently, itd be great if you pushed fwd on yours, was very excited to hear about it awhile back, those types of efforts are rare on here...

@vzn Oy! :P

@Mithrandir24601 a lot less alcohol, i'd think.

but i mean, yeah.

how are you supposed to commercialize a completely fictional drink? =P no, really, though, i don't think it's cheating to make it butterscotch-y.

@Mithrandir24601 you are a delightful exception. also, a "pro physicist" was thinking "amateur science".

@vzn OK, that's fair, I'll let you get away with that :P

(although I'm not overly sure how much of a 'pro physicist' I actually am)

← lol, whew! otherwise "gets away" with next-to-nothing )( on here o_O

@Mithrandir24601 (lol oh geez you phd guys and your "pro" modesty... wasnt your group published in nature or science recently... saw that link you posted awhile back but just barely!)

@vzn not really amateur scientist at this point, seeing as i haven't done any actual science =P

@JohnRennie hi.

@heather you did significant bkg research on an independent/ amateur tabletop photon experiment, found some great/ excellent refs, found equip suppliers etc, + bet youre doing stuff at school.

@vzn Oh yeah, the last time one of my friends/people from the group I'm in published in Nature, when was it? Three days ago now ;)

Here we go: nature.com/articles/s41586-018-0152-9

@Mithrandir24601 elite crowd! :) so what are you doing on SE anyway? :P

@user187604 Hi

@vzn Actually, now I think about it, you have the most ridiculously good sense of timing :P

@JohnRennie did you change the time of your attendance in se chat?

@Mithrandir24601 lol, blushing now! not so much )( positive feedback on here sometimes :'( :P

@JohnRennie I mean due to work. Did you change the time of your presence in se chat which was from 5am—1pm. In case if I have to ask you In other time.

@user187604 I don't have a set time I join the chat room, though I am generally around between 05:00 and 13:00. Today I've been busy attending to a server.

@JohnRennie whenever I touch your icon it shows last seen 56 seconds ago. Do you turn the net on all time on your laptop? Asking if I could know you are online or not?

@Blue This link works, the other one is slow to load

@Blue Not having read it yet, I suspect that here, n is just a label

Most entertaining fictional news read so far

@JohnRennie likewise it's showing 30 seconds ago..

@vzn ah, nice.

@user187604 My computer is on all the time and I often leave Chrome running, so my last seen time doesn't mean I'm actually at the computer.

When Slereah is on next time, I am gonna to post that snapshot of EVE to create a contradiction in h bar

@heather are you too busy now to pursue your bell experiment ideas? fyi this was my latest wild + crazy idea, needs +1s physics.stackexchange.com/questions/402680/…

@JohnRennie oh so so far I have made a wonderful world record of pinging you 5 Times (I guess) :p

That will be soooooo interesting for our goals of The Plan

@vzn i am rather stuck currently, at least partly because BBO crystals are, well, rather expensive, and at least partly because i have no idea what i'm doing =P

@JohnRennie had a hard work today?

@vzn Not always 10x the cost but near enough, yeah

Oh I guess I'll beat my record :p

@Blue Hmm... I'm having a look now

@heather yep BBO very tricky & maybe the major hurdle but maybe a small one wouldnt be so expensive... have wondered about that myself... afaik there are other materials that are "similar"... think you may have mentioned another material or maybe saw one in a paper... trying to remember...

@vzn there are other crystals, but as far as I can tell just as specialized and expensive, unfortunately.

KDP crystals, for example, can be used.

@heather small ones work and maybe can be found from places other than "pro optical suppliers" (like the beamsplitter) which are killer $ typically. :| ... esp if they are used as electronics parts somehow...

@vzn yeah, i just haven't found the right spots yet, probably.

oh, yeah, i love electronics surplus stores.

@Blue I'm going to hazard a guess that, for a given sample $n$, $x_j^n$ represents the value of the $j^{th}$ neuron for that sample

@heather its a (very) tricky problem, almost nobody else in the world is attempting it, so was defn impressed with your effort/ ideas so far, even maybe cited it in a blog iirc

@JohnRennie all right professor take a great rest and food. I'm not gonna vex you anymore today. I'll come back tomorrow. Goodbye. Good night from India....

@user187604 I'm afraid my presence here is a bit intermittent right now ...

@Blue In the classical case, yeah

Or at least, that's what I'd assume

I don't see any reason that you couldn't have more than one bit per neuron...

@JohnRennie today or forever?

@Blue but in the quantum case, this happens naturally using a single qubit

@Blue Yeah, this makes sense. I'm really not sure though

@Blue Yeah, multiple qubits per quron makes more sense

@heather bet just like your dad, inherited... my dad/ brother liked em lots too :)

@Blue Sup.

@JohnRennie I'll ask you tomorrow good night from India....

@Blue Actually, no, they just use $x_j\in\lbrace 0, 1\rbrace$, at least for this bit

@Blue I think I've revised derivatives good enough. If you don't want now, we could continue later?

@Blue Considering that "binary values of a McCulloch–Pitts neuron" is apparently a thing, that seems possible

Ok @Blue. What should I google to see the derivation of the N/2 thing?

why not use a textbook?

@Blue From Fig. 2, I'm fairly sure that's the case, at least to begin with

So @Blue I should learn how to find the derivative of Permutations and combinations?

Ok. So that's all for now? Just Permutations and combinations?

Ok, see you guys.

@Blue I've just found the sentence "i.e., each quron is a single qubit", so that helps clarify that, at least. Later, more qubits per quron means that it looks more continuous than discrete (until you get to the $10^{-m}$ level anyway), so presumably you get more accuracy or something

cya @NovaliumCompany

@Blue I believe so (bear in mind I don't actually do machine learning :P )

@Blue As in, if you've got $m$ qubits (maybe $m+1$?)

(or something similar to that) you can then measure down to... Whoops

That should be $2^{-m}$

I'm thinking in binary, sorry :P

@Blue yeah, that

@Blue Sometimes, the computer scientist in me pops out

@Blue machine learning's highly sought after, so no better time to start than the present

:)

@Blue ah, from equation 11, it's just the output value i.e. What is the probability of the output being the state $\left| k\right>$, given the input $x^n$?

@Blue Something along those lines, presumably?

@Blue yeah