The h Bar

@Черенки I guess you should start reading relativity seriously. Your question requires a very long answer. BTW, I don't think I can help much either (because I haven't read much beyond Lorentz transforms)

0celóñe7

I'll wait until you leave

DanielSank

8:39 PM

@0celóñe7 name calling, eh?

@Черенки Huh?

Черенки

@DanielSank what do you mean "Huh?"

DanielSank

I don't understand this comment:

1 min ago, by Черенки

General chat for Physics Stack Exchange

Черенки

howcome?

which part?

do you have to understand it?

0celóñe7

Thrilling conversation

Anonymous

@DanielSank I think you understand it but you don't understand why he posted it.

Anonymous

8:41 PM

=P

DanielSank

@Blue Right.

Черенки

Seriously why do you want to understand it

is it that big of a deal

Anonymous

Gosh.

DanielSank

No, it's not a big deal.

People ask questions all the time, even when it's not a big deal.

Anonymous

I should chicken out.

Черенки

8:42 PM

what is a big deal

DanielSank

@Черенки chocolate.

Черенки

i think the problem lies in the notion that we think some "things" are a big deal

DanielSank

I think you're making too big of a deal out of this issue about what is or is not a big deal.

:-P

Черенки

indeed

DanielSank

So let's make a deal:

Черенки

8:43 PM

oke tell me about experimental quantum devices

DanielSank

Let us agree not to deal in the bigness of other deals.

@Черенки I would be happy to do that if you have a particular question.

Черенки

what are they

DanielSank

Uhh... an experimental quantum device is any device that is used in an experiment in which quantum mechanics is relevant.

Черенки

ok

so what are you mainly experimenting

0celóñe7

@BalarkaSen JP was on the h3h3 podcast

I suggest watching the meme lord

DanielSank

8:47 PM

@Черенки I work in a lab that is trying to build a quantum computer.

I research things related to that.

Черенки

sounds nice

DanielSank

It is a lot of fun.

Balarka Sen

@0celóñe7 already seen it

good roast

DanielSank

so why is your name черники?

Anonymous

@DanielSank Is that Russian ? What does it stand for in English?

Anonymous

8:51 PM

"Why is your name *****?" sounds like a strange question. :P

0celóñe7

I can tell you why my name is what it is

Anonymous

@0celóñe7 Go ahead

0celóñe7

@Blue Back in 10th grade I had a different standard user name

please remove that

Anonymous

@0celóñe7 What ?

0celóñe7

@Blue what what?

0celo7 was not always my standard

I am telling you why I am 0celo7

Anonymous

8:53 PM

@0celóñe7 What was your previous user name? And why do you call yourself 0celo ? Go ahead :D

Черенки

@DanielSank its just a name

0celóñe7

@Blue it is a mystery, but you can find the old name in a picture I've posted in this chat

Anonymous

@0celóñe7 I'll check the transcript someday. Now the other question .... what's 0celo7?

0celóñe7

@Blue I was in 10th grade and was playing BF3 with a friend from school

Anonymous

Okay ?

0celóñe7

8:58 PM

we ran into some people and started playing with them, did the whole friends list thing

I was playing with them for a while and they said that my name was bad

they all had metal gear solid themed names, and my favorite from MGS1 is Revolver Ocelot

So I changed it and Revolver 0celo7 is the one I was finally able to get on Xbox Live

then people just called me 0celo7, so I tend to shorten it to 0celo7 now

Anonymous

Oooo. I c. 0celo7 sounds cool though

Anonymous

My name is just my favourite color.

Physics Meta

0

Q: Is this legal to post my physics question here for verification only but not for answer?

Is this legal to post my physics question here for verification only but not for answer? I just want to make sure that my question is on-topic, not off-topic, and fits the rules, like it's not too broad and etc. I have already read all the "How to ask" sections on the help center and then in ph...

discussion

Черенки

any recommendations for sources to read special relativity

0celóñe7

@ACuriousMind I think I still want to ask that

Anonymous

9:09 PM

@Черенки Start with Shankar's lectures. I found those very helpful. For book recommendations you can check the corresponding MIT OCW syllabus page for SR.

0celóñe7

There must be a typo

Черенки

how about leo susskind

ACuriousMind

@0celóñe7 What?

0celóñe7

@ACuriousMind The deleted message.

Anonymous

@Черенки I didn't like it much

ACuriousMind

9:10 PM

@0celóñe7 Why would you delete it if you want to ask it?

0celóñe7

@ACuriousMind Accidental deletion.

ACuriousMind

How does that happen?

0celóñe7

@ACuriousMind Misclick on the edit screen?

ACuriousMind

Is that a question or an answer to my question? :P

0celóñe7

@ACuriousMind A possible answer that I am unsure about.

Serves: 8

Good lord

6 pounds of chicken lmao

@ACuriousMind So, no answer I take it?

It doesn't make sense to me either

Clearly $M$ is open in the subspace topology (duh), so not sure what's up

ACuriousMind

9:21 PM

@0celóñe7 No idea what "relatively open" is supposed to mean in that context. Generally I'd consider "for $Y\subset Z$, $X\subset Y$ is relatively open if $X = U\cap Y$ for some open set $U\subset Z$", but that doesn't seem to be the case here

AccidentalFourierTransform

9:33 PM

Черенки

9:48 PM

does anyone have a pdf for robert resnick special relativity

AccidentalFourierTransform

"teach a man to fish"

gen.lib.rus.ec

0celóñe7

@ACuriousMind wee-ooo-wee-ooo

AccidentalFourierTransform

@AccidentalFourierTransform I do not have 20 reputation points to talk in the chat unfortunately :( So I am writing here. OK, fine, I do not care if what I described really is a classical field theory or not. What I am asking is whether "A classical theory plus a vacuum state plus creation and annihilation operators plus Born's rule" can be defined as QFT such that other results of QFT essentially are derived from this definition. That's all I ask really. If this question is a misunderstanding, then I will ask separate questions, dividing them into chunks. — Lucia Guzheim 24 hours ago

maybe someone could invite her to chat?

i dont know how to do that

or I dont even think I can

Черенки

@AccidentalFourierTransform olalala

0celóñe7

she can be invited by a mod, but still won't be able to chat

AccidentalFourierTransform

9:54 PM

every "ooh wee" that mr.poopy butthole ever said [SPOILERS]

►

ACuriousMind

@AccidentalFourierTransform She should be able to talk in this room now.

AccidentalFourierTransform

thx m8

did she get a notification? or should I leave a comment?

ACuriousMind

afaik there is no notification - I could superping, but you might as well just leave a comment

AccidentalFourierTransform

ohhh super ping, that sounds interesting

$[@,@]=\sigma$

I shall leave a comment anyway

Черенки

I want to know more about why moving charges create a magnetic field

is special relativity the way to go

???

0celóñe7

10:00 PM

my picture just fell off the wall

how do I put it back

Черенки

spit on it

than leave it on the floor

0celóñe7

wtf

AccidentalFourierTransform

what picture is it?

Черенки

is it framed?

I want to know more about why moving charges create a magnetic field
is special relativity the way to go

0celóñe7

@AccidentalFourierTransform family pictures

the hanger is broken

Черенки

10:01 PM

just answer meeee

0celóñe7

how did this happen

AccidentalFourierTransform

special relativity is for kids m8

learn general relativity already

Черенки

no seriously

AccidentalFourierTransform

@0celóñe7 that must be a sign. Perhaps your family doesn't love you?

0celóñe7

@AccidentalFourierTransform or their love is so much it was too heavy for the hanger

why you gotta be negative

Mithrandir24601

10:04 PM

@Черенки yes, special relativity. I mean, general relativity is better, but best to start with special relativity

Черенки

thx

AccidentalFourierTransform

@Черенки (thanks autocomplete) read Feynman's lectures

Черенки

I have the first volume and the 3

3.

Mithrandir24601

@Черенки feynmanlectures.caltech.edu

0celóñe7

@AccidentalFourierTransform no one less than 300 lbs

Черенки

10:06 PM

YOU PEOPLE

AccidentalFourierTransform

I dont know what 300 lbs is

0celóñe7

@AccidentalFourierTransform why did that disappear

AccidentalFourierTransform

deleted it

0celóñe7

@AccidentalFourierTransform 50 stone

@AccidentalFourierTransform why?

Черенки

YOU KNOW GREAT STUFF

0celóñe7

10:06 PM

@Черенки pls stop annoying

Черенки

ok sorry but

i did not know these websited even existed

AccidentalFourierTransform

"300 lbs to kg"

Черенки

and they are soooo great

AccidentalFourierTransform

> 136.078

wft m8

@Черенки I know a lot of cool websites

Черенки

ppoooost

plz

AccidentalFourierTransform

10:07 PM

no, ACM is watching

0celóñe7

4chan.org

Черенки

wow i did not know that

AccidentalFourierTransform

remember lemon party? whatever happened to it

0celóñe7

4chan.org/boards/sci is pretty damn good

@AccidentalFourierTransform I had one the other day

AccidentalFourierTransform

one lemon party? like the one on the webpage?

interesting.

Черенки

10:09 PM

craigslist.org/about/sites

ACuriousMind

@AccidentalFourierTransform Y'know, that shouldn't be your primary reason to behave yourself.

0celóñe7

@ACuriousMind Not the primary, but without you here there would be lots of porn.

AccidentalFourierTransform

but if you are not around to observe me, do I even exist?

0celóñe7

Sofia knew it back in the day and we know it now.

Mithrandir24601

@Черенки I don't know what level you're at, but a couple of years ago, one of my friends worked on this for people transitioning from A level to undergrad physics

ACuriousMind

10:12 PM

@AccidentalFourierTransform Trickier question: Do I exist if I don't observe you?

AccidentalFourierTransform

I dont know, I'm a solipsistic

Mithrandir24601

@ACuriousMind The 'I' evolves with time, so the 'I' at one moment is not the same 'I' as the next, hence the 'I' at the moment that was typed will never exist again ;)

DanielSank

Oooooooh, are we talking about identity?

I wrote an essay on the topic when I took a (terrible) metaphysics course in college.

I remember stapling a mobius strip with some world-lines drawn on it to the essay.

Fortunately, my grader was an ex-chemist who appreciated such things.

AccidentalFourierTransform

lmao

Mithrandir24601

@DanielSank Possibly... I never did any metaphysics stuff, so... I don't really know what I'm talking about :P

ACuriousMind

10:17 PM

@Mithrandir24601 Continuity of identity is a tricky question. If the I at one moment is not the same as the I at the next, then what does the phrase "the I" even denote?

Mithrandir24601

@ACuriousMind It's a function, so it should really be 'I(t)'

AccidentalFourierTransform

and the question is meaningless unless you define a topology anyway

0celóñe7

indeed, continuous wrt. which topology?

DanielSank

It's not tricky. It only feels tricky because philosophers want job security.

rant rant rant rant rant \rant

AccidentalFourierTransform

I could say the same thing about quantum computing ;-)

ACuriousMind

10:21 PM

@Mithrandir24601 Ah, then we end up at the question why we would consider $I_1(t_1)$ and $I_1(t_2)$ "the same" but markedly different from $I_2(t_2)$, where $I_i$ are the identity functions associated to different brains.

AccidentalFourierTransform

BTW no Rick and Morty fans here?

Mithrandir24601

@ACuriousMind but they're not the same - that's what I (though I) was saying

ACuriousMind

@AccidentalFourierTransform Why would you think not?

AccidentalFourierTransform

Rick and Morty Exquisite Corpse | Rick and Morty | Adult Swim

►

neat.

ACuriousMind

@Mithrandir24601 Ah, "the same" was a poor choice of phrasing. We generally feel that all the $I_1(t)$ are closer "related" than $I_2$. If you don't hold that view. If you disavow that view, then you're off the hook.

DanielSank

10:25 PM

@AccidentalFourierTransform Nobody says quantum computing is complicated.

Mithrandir24601

@ACuriousMind Hmm... It's a topology problem :P

DanielSank

The other day someone from the WSJ asked me to explain why quantum mechanics is weird.

I went off on a rather well-reasoned and carefully articulated rant about how it's not weird and that people only say that to sound cool.

I even went so far as to say that Feynman's famous statement that {anyone who thinks they understand quantum mechanics is wrong} is destructive, stupid, and should not be repeated.

AccidentalFourierTransform

and now you are saying that it is not weird to sound super-cool 🙄

but yeah, Feynman's full of crap there

oh, did we have our daily rant about how Feynman is overrated?

I think not

DanielSank

::raises hand::

I'll do it!

Mithrandir24601

@ACuriousMind it's continuous in one direction (time), but discrete in another (different brains) - as such, some $I_j\left( t_1\right)$s are closer to $I_i\left( t_1\right)$ than $I_i\left( t_2\right)$

DanielSank

10:28 PM

Feynman was incredible. He was one of the best calculators ever.

AccidentalFourierTransform

brains are not discrete ffs

DanielSank

He was brilliant, no question.

However, his technical books kind of suck.

AccidentalFourierTransform

his lectures are nice dude

DanielSank

At least, I got little/nothing out of the famous lecture series.

Meh.

AccidentalFourierTransform

well, when did you read them?

were you already a physicist?

DanielSank

10:29 PM

I was a student.

Mithrandir24601

Feynman was, I'm told, not the nicest of people

DanielSank

I've read a few of this things. They're vague and wishy-washy and try to pretend that you don't need math, which is complete and utter crap.

I really strongly dislike that.

I don't even want rigorous math, but telling me that you can understand QFT without math is ridiculous.

AccidentalFourierTransform

oh yeah his QED book is awful

DanielSank

"You just add up the little arrows" <-- Oh give me a f------ break.

Mithrandir24601

"Chased women around the lab" is something I feel like I can quote (I think that one was about Feynman)

DanielSank

10:30 PM

That doesn't make him not nice.

Mithrandir24601

@DanielSank That was the 'nice' bit

DanielSank

You know, my dad actually sat next to him on a plane once.

AccidentalFourierTransform

cool

DanielSank

Apparently the movie player wasn't working. My dad noticed that the plane was full of physicists and commented to Feynman that you'd think on a plane full of physicists you'd have someone who could fix a video player.

AccidentalFourierTransform

is it on instagram?

DanielSank

10:31 PM

Feynman apparently said "Nah, we're all theorists".

I found that particularly funny because Feynman was quite a tinkerer in his youth.

AccidentalFourierTransform

anywayz

off to bed

l8r

ACuriousMind

@DanielSank I never understood why he made these strange claims, given that there's that famous "magnets" interview where he pretty much says that he can't explain the fundamental theory of magnetism without the other person knowing a bunch of prerequisites/math.

Mithrandir24601

@AccidentalFourierTransform Night! See you in... 20.5 hours...

(on here)

Phase

10:49 PM

When I make a matrix of eigenvectors to change the basis of the matrix, does the non-commutative nature of matrices make how I make the matrix of eigenvectors important? As in, one column before the other or vice versa

DanielSank

It depends.

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