The h Bar

0celo7

3:02 AM

okay wait.

Obliv

@0celo7 do you know how to make a nuclear bomb yet

0celo7

Yes.

user218912

okay I am having trouble understanding the lorentz group.

0celo7

eh...join the club

Obliv

3:06 AM

can you teach me? also how expensive do you think they are? (do you think I can afford the materials?)

0celo7

I might not be able to help here

@Obliv You're on a list now.

Obliv

I wonder if it's a profitable market.

I'm on many lists dw @0celo7

0celo7

shouldn't you be studying?

Obliv

I am

gotta have brief moments of idiocy to balance all of this knowledge storing

user218912

@0celo7 in this is there summation going on?

user218912

3:08 AM

why is the matrix labelled with $ab$?

0celo7

if you have a matrix acting on something with one index the matrix will have two indices

yes I think there's a summation.

Weinberg confirms.

user218912

and are the labels the matrix elements or dummy indices?

user218912

or both?

0celo7

ask that question again

user218912

what do the labels mean?

user218912

3:10 AM

$ab$

0celo7

they're indices on the matrix

user218912

okay.

0celo7

they're saying that you have a collection of fields $\{\phi_a\}_{a=1,\dotsc, N}$

user218912

oh damn I forgot about that, and it's in the screenshot too.

user218912

makes sense now.

0celo7

3:12 AM

and you have the operators $\{D_{ab}(\Lambda)\}_{a,b=1,\dotsc, N}$ such that $$\phi_a(x)\mapsto\sum_b D_{ab}(\Lambda)\phi_b(\Lambda^{-1}x) $$

0

Q: Do Airline Pilots Live Longer?

We all know about relativity and the effects of speed and time. When we put two atomic clocks one on earth and one on a rocket we noticed a significant time difference. I believe the rocket was traveling around 25,000mph and it was a shift of about 4-5 minutes. So if we take this idea and apply i...

@IceLord Do you know the user Paul?

user218912

@0celo7 no.

user218912

what about him?

0celo7

I thought he might be you.

user218912

proof?

0celo7

I've heard about Ashcroft-Mermin from two people: you and him.

user218912

3:20 AM

@0celo7 it's the most famous solid state physics book.

user218912

every researcher in condensed matter knows it.

0celo7

I'll ask my QM prof.

user218912

lmk what he says.

user218912

I don't like that book though.

user218912

the problems require ipho level problem solving skills in physics.

0celo7

3:22 AM

@IceLord linkedin.com/in/cristian-batista-85b4899

user218912

@0celo7 what, is that your qm prof?

0celo7

he doesn't have a CV up because he's new

@IceLord yes.

According to google he has 4500 citations

user218912

I don't have linked in so I can't see the full profile.

0celo7

Seems legit

he works in CMT

user218912

what kind of CMT?

user218912

3:24 AM

I want to do holography applications to condensed matter.

0celo7

magnetism

user218912

My dream right now is to read the book "field theories of condensed matter physics" by fradkin.

0celo7

frustrated magnets

user218912

but it requires qft I, and II and condensed matter to read.

0celo7

i.e. magnets which cannot be described classically

so he basically does field theory?

user218912

3:25 AM

@0celo7 oh I thought you meant magnets that were having a bad day.

user218912

@0celo7 well most phenomena in modern condensed matter physics is described by field theory methods.

user218912

Idk exactly because we haven't learned anything in our condensed matter course.

0celo7

journals.aps.org/prb/abstract/10.1103/PhysRevB.94.115111

a recent paper

arxiv.org/abs/1607.07100

> Quantum Condensed Matter Division and Shull-Wollan Center, Oak Ridge National Laboratory, Oak Ridge, TN

That seems like a cool place to work

user218912

yep

DanielSank

@0celo7 Projectile motion equations @ very (!) high starting velocity

0celo7

3:32 AM

:D

user218912

@0celo7 what do you think I'll get on my QFT problem set 1?

user218912

I did 50% of it alone.

0celo7

Help on Kinematics! @DanielSank

I don't know @IceLord

user218912

I'll lyk in 1 week from now.

user218912

I also need >70% to pass the course.

user218912

3:33 AM

I think it's good so far.

0celo7

w/ lots of help it's good

user218912

xD yep

0celo7

you're damn lucky I didn't take that bet.

Obliv

@iceL is it an intro-qft course? Or does it assume some background in QFT already?

user218912

@Obliv intro

Obliv

3:35 AM

Wait are you a year younger than @0celo7 and I?

or same age?

user218912

@Obliv 3 months younger than 0celo7, 1 academic year younger than both of you.

Obliv

when's your birthday

user218912

jan

user218912

98

0celo7

@IceLord I'm putting Weinberg on my desk for now

user218912

3:37 AM

@0celo7 :D

Obliv

how does that work

user218912

@Obliv how does what work?

0celo7

@Obliv I used my hands

Obliv

wait

0celo7

What kind of stupid question is that

Obliv

3:37 AM

@0celo7 your birthday is this month?

0celo7

@Obliv ...yes?

Obliv

ahaha I'm a month older than you

better treat me with some respect youngin'

0celo7

Don't push me.

Obliv

what do you want for your birthday?

don't say a math textbook

user218912

@0celo7 If I get you lee for 15 spoon feeds then what will I get for your birthday?

DanielSank

3:41 AM

Can someone remind me why posts like this are off-topic?

0celo7

Why are you getting me something for my birthday?

DanielSank

Why don't we want clear questions asking for confirmation that a calculation is done correctly?

0celo7

Because it's a yes or no question, AFAIK those are banned.

user218912

@0celo7 cuz ur my friend?

0celo7

@IceLord Uh, thanks, but tbh I wasn't planning on getting you anything...

@Obliv First and foremost I want a new phone, but I'm already getting that. After that...yeah basically books.

Obliv

3:43 AM

I'm just wondering. I'm a broke college student with no appreciable skills. The most I'll do is remember your birthday and maybe gift you something on steam if you have one.

@0celo7 what phone do you have rn?

0celo7

No Steam games

@Obliv iPhone 5s

I don't have time to or want to play video games

Obliv

get a galaxy S#

Sir Cumference

^

0celo7

No I'll get a new iPhone

Sir Cumference

S# is the best

@0celo7 Why tho

user218912

3:44 AM

@0celo7 that's okay.

0celo7

Apple Music

user228700

Hi :-) Is anybody currently studying chemistry?

user218912

@0celo7 7?

0celo7

@IceLord Yes

user218912

:O

Sir Cumference

3:44 AM

I heard the iPhone 7 was just the same as the 6?

Obliv

@0celo7 your reasoning sickens me

Sir Cumference

Just without a headphone jack

user218912

@Kaumudi just ask.

0celo7

@SirCumference Well I like the 6 so that's fine.

@Obliv ...sigh.

Why?

I get all the music in the world for $5 a month.

user228700

@IceLord Yeah, no, I already asked at the CSE chat; I was wondering if anybody currently in this room studies Chem.

0celo7

3:45 AM

How is that not the most amazing thing?

Sir Cumference

@0celo7 Just look for songs on Youtube

or something

0celo7

I was currently studying it 4 years ago @Kaumudi

Sir Cumference

There's plenty of good music

user218912

@Kaumudi I studied chem 3 years ago, up to 1st year uni level.

user218912

but I don't remember most of it.

Sir Cumference

3:46 AM

@0celo7 Huh, never knew you liked chem

Obliv

@0celo7 because you're paying $5 a month for free music that probably doesn't even directly go to the artists.

0celo7

@Obliv So? I still get the music.

user228700

@IceLord Awesome. I'll wait then.

Sir Cumference

@0celo7 You're paying apple for nothing.

user218912

@Kaumudi just ask your question... maybe someone can answer it.

Sir Cumference

3:47 AM

That's kind of what people do nowadays.

0celo7

@Obliv [citation needed]

@SirCumference [citation needed]

Sir Cumference

@0celo7 Can't you just look for the songs on youtube?

0celo7

No.

Sir Cumference

At least those videos have ads and the artists get paid

Obliv

Nah youtube drains data

Sir Cumference

3:48 AM

(usually)

0celo7

(i) YouTube has garbage quality

(ii) YouTube kills the battery and data

user218912

@0celo7 what headphones do you use?

Obliv

Okay wtf are you talking about @0CELO7 how can you notice the difference in audio quality?

0celo7

(iii) Some labels are aggressive about removing music from YouTube

Sir Cumference

@0celo7 iPhones just have bad batteries

0celo7

3:49 AM

@IceLord Sony XB500

Obliv

wait why wouldn't itunes kill your data

oh you just download it directly there

that's retarded.

Sir Cumference

So then use iTunes

you can use that on mac

no need for apple music

user218912

@Obliv how?

0celo7

@SirCumference Yeah let me spend $200 a month on music.

If you give me the money, I will

user228700

@IceLord Alright. How does the common ion effect affect the degree of dissociation of the reactants?

DanielSank

3:51 AM

@0celo7 Right but why?

The point of the site is to generate useful content. A clear yes/no question is valuable content.

0celo7

@DanielSank I take the PSE rules as god-given, I cannot understand them.

@SirCumference Garbage quality and how is that not theft?

No, it actually isn't.

Obliv

running dangerously low on coffee

half a cup left back to studying.

Sir Cumference

Well, I don't listen to music, so I wouldn't know.

0celo7

Why are you people attacking me?

Obliv

@0celo7 because you openly admitted to wanting to purchase a phone because of itunes

for one app

It's probably not a bad idea if you're not going to use the full potential of a galaxy phone anyway, scrub.

0celo7

3:53 AM

@Obliv I should flag your use of the $r$-word.

Obliv

no no no

that's unnecessary I love the mentally-handicapped.

I forgot what that was a reference to

user218912

@Kaumudi there will be less dissociation because the equilibrium shifts to the left when you add a common ion.

0celo7

I don't even remember what dissociation means.

DanielSank

@Kaumudi did your avatar and name change?

user218912

@0celo7 in chemistry it means exactly what the regular word means.

0celo7

3:57 AM

Skrillex & Rick Ross - Purple Lamborghini [Official Video]

►

user218912

@0celo7 retarded is used in physics a lot.

user218912

we're learning about retarded greens functions this week.

0celo7

In a different context.

user218912

@0celo7 if I listen to the kind of rap you listen to will it improve my math skills?

0celo7

That's barely rap right there

Classic:

Rick Ross - Hold Me Back (Explicit)

►

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