The h Bar

0celo7

00:02

@ACuriousMind damn, you've escaped the Skype call again

DanielSank

00:14

@0celo7 It's literally the "look of disapproval".

0celo7

@DanielSank That's not what my dad's face looks like

user507974

04:49

@FenderLesPaul what did you think of sakurai

FenderLesPaul

05:13

@user507974 it's really good

user507974

@FenderLesPaul at least the first few chapters seemed so to me

you seemed to not like any book other than landau as i was browsing through

FenderLesPaul

I do like Landau a lot

but Sakurai is definitely good

it's more modern than Landau for sure

I just find QM a very boring subject to learn and most books don't make it any more fun

but for me Landau is actually fun

0celo7

QM is the most GDP theo physics

DanielSank

06:26

@FenderLesPaul Heh, just wait until you get to the zombie chapters.

Sakurai died before the book was published and someone else put together the last few chapters. We called that section of the book "Zombie Sakurai" and it's considerably less clear than the preceding stuff.

Sakurai is the best book I know of for angular momentum. For everything else I think it's pretty par for the course.

There's a really important issue relegated to a homework problem: do degenerate perturbation theory in the cast that the perturbation does not lift the degeneracy to first order.

Definitely do that problem.

Bernard Meurer

@DanielSank Would you happen to know any programming/soft dev wiz that I can ask a couple questions about framework choice for a project?

user507974

@DanielSank did you ever get a response on fundamental papers?

DanielSank

06:55

@BernardMeurer That's one of those annoyingly general questions.

What type of project?

There's no one oracle that knows all the things.

I'd direct you to different people for web versus imbedded versus high performance etc. etc.

@user507974 On what? Sorry I don't remember what you're talking about.

user507974

@DanielSank the random interferences of oxygen on nanowires

DanielSank

@user507974 Oh right.

Check out papers on the following people's websites:

John Clarke
Clare Yu

Robert McDermott

Clare Yu's group is trying to understand the microscopic origins of this noise theoretically.

There aren't any review papers, according to Prof. McDermott.

user507974

@DanielSank for a 30 year old problem?

DanielSank

@user507974 I know, right?

user507974

ok, well already some interesting stuff is popping up via the magic of the internet

@DanielSank just physics things

DanielSank

07:03

It's really, really hard. There hasn't been much progress until pretty recently.

user507974

(in bubbly latex)

DanielSank

@user507974 Wat?

user507974

@DanielSank have you ever seen those "justgirlything" pictures posted around

google.com/…

"major problem remains unsolved in physics for 30 years, no major outlines of problem cuz its too hard" justphysicsthings

DanielSank

Got it.

I thought that might be what you meant :D

user507974

@DanielSank yep, btw, people like to talk about LIGO as the most sensitive instrument in the world, which is true in a kind of a way, but compared to LIGO, what are some of the extreme conditions you've observed in the quantum computers you work on (like temp, pressure, containment, radiation proofness, etc.)

i feel like your system is far more sensitive to many types of interferences than even LIGO despite all the extra noise that pops out when you get to sub-nucleus length scales

Slereah

08:19

Hello

Sᴋᴜʟʟ ᴘᴇᴛʀᴏʟ

08:40

ams.org/notices/200501/fea-dundes.pdf

Sidarth

jhallo

Abhas Mitra has sent a 3 page report to the people working at LIGO

Questioning how they called the result as the emission of grav waves due to 2 orbitting true black holes...

he has got no response from them it seems

he recently gave a guest lecture here...

Slereah

what a whiny baby

Sidarth

@Slereah ?

yuggib

09:17

@0celo7 what do you need?

Secret

10:54

http://www.kulr8.com/story/31314186/can-this-man-guess-the-number-in-your-head
I picked a number that no one else has picked, because it is not an integer

Sᴋᴜʟʟ ᴘᴇᴛʀᴏʟ

You broke the rules.

Sidarth

12:05

how is this book exploring black holes introduction to general relativity

@ChrisWhite

@0celo7

Bernard Meurer

12:48

@DanielSank You're right, that question was a bad one. I'm sorry, let me make it better.
Do you know any web-based application wiz with a background in JS, Node and, if possible, Ruby on Rails and Django that I can ask a couple of questions relating to the development of a project?

Mark Mitchison

@Qmechanic are you there?

just wondering why you added the quantum-hall-effect tag to this question

which just adds to the confusion

(in my opinion)

Qmechanic

@MarkMitchison : Yeah. It is not perfect. Remove it if you think it is better.

Mark Mitchison

OK, thanks

I didn't want to roll back your edit without asking

0celo7

13:06

@Sidarth what?

0celo7

13:22

@yuggib after struggling for many hours ACM relented and gave me the trick

I'm good now

@BernardMeurer oh my god Khaled is amazing

John Duffield

@bolbteppa : huh? I'm not "admitting the speed of light is constant in general relativity". I'm saying the speed of light is not constant, full stop. And there's no confusion about "the curvature of light rays occurs only in spaces where the speed of light is spatially variable". That doesn't agree with what you're saying.

If "all those Nobel prize winners" think the speed of light is NOT spatially variable, they're wrong.

@user36790 : he didn't say all that. He said the speed of light is spatially variable.

Slereah

13:42

-6

Q: Who thinks that "ACuriousMind" user is a dick and a douche?

I do. Who else? Don't be ashamed to spread the truth. He is an idiot.

Please upvote

ACuriousMind

I wonder how he decided which tags to choose

Slereah

I think he went by most popular tags

Oh wait no

no EM or Homework

ACuriousMind

That would have been QM, EM, HW, Newt-Mech and QFT

yuggib

13:57

@ACuriousMind What did you do to the guy?

he used quite strong words

0celo7

@yuggib Many things I'm sure.

ACuriousMind

@yuggib No idea, I can't even recall interacting with him

yuggib

@0celo7 neither you and JD ever used such a language in your disputes :-D

@ACuriousMind Ah...maybe you did something to him in real life o.O

ACuriousMind

It's pretty strange. The last visible activity from that user is a comment from May of last year.

yuggib

@ACuriousMind probably it is the very feared and famed sockpuppet

ACuriousMind

14:03

Yeah, that's possible. But why use an existing account and not a new one to post that?

Now the rep that account had is gone because valid offensive flags give -100 rep

yuggib

I see

completely unforeseen actions like that are always puzzling

ACuriousMind

I hope this doesn't become a week-long streak of such posts like with the "DanielSank is a puppetmaster" user :D

ACuriousMind

14:26

-1

Q: Martial arts biomechanics; based on outdated physics theory?

I see it very frequently in Hollywood films: There are two People fighting and there is one kicked, punched, thrown, smashed and so on. I have read some books and articles about the biomechanical principles that Play a role in martial arts; but unfortunately I don't understand it! I know about ...

quantum-mechanics classical-mechanics models

wat

"Scattering amplitudes (and therefore the right Dynamics of collisions) is a lot more easy to compute by Quantum mechanics than by classical mechanics. "...uhhhhh, no?

Bernard Meurer

@ACuriousMind Is a manifold on a non-hausdorff a thing?

ACuriousMind

@BernardMeurer I don't understand the question

Bernard Meurer

Can you have manifolds in non-hausdorff spaces?

I want to answer I'm a manifold in a non-haudorff space when a form asks my gender identity

ACuriousMind

If you're asking whether manifolds have to be necessarily Hausdorff, then no. However, many define them to be because a non-Hausdorff manifold loses many desirable properties

Bernard Meurer

Gender: Manifold in a non-haudorff space

ACuriousMind

14:38

@BernardMeurer Manifolds are not "in" spaces. They are themselves spaces

Bernard Meurer

Dammit, now I filled that form

can I be a non-hausdorff manifold then?

ACuriousMind

Yes, but I'd advise you not to, because you lose partitions of unity

Bernard Meurer

Gender: non-hausdorff manifold

sounds good

What kind of manifold you advise me to state on gender than?

I really want to be a manifold

ACuriousMind

I don't understand the question

Bernard Meurer

I'm filling a form for registering for a hackathon

It asks what my gender is, and yesterday I had the idea of writing some random mathematical stuff there just to fuck with people trying to get it

so I wanted to say my gender is a manifold

but that was too mainstream

then I thought non-hausdorff manifold

Can I get it any more obscure?

John Duffield

14:48

@BernardMeurer : well, if you really want to be a manifold you ought to fill in your gender as homeomorphic. Then I'm sure you'll make lots of new friends.

Bernard Meurer

@JohnDuffield Sorry for calling you crazy the other day by the way, I was way overboard. My sincere apologies

And I do like that idea hahaha

John Duffield

Uh oh.

Gotta go.

Bernard Meurer

I'm going with homeomorphic manifold, definitely

ACuriousMind

@BernardMeurer That's non-sensical. "homeomorphic" is a relation, you say "X is homeomorphic to Y". To speak of a "homeomorphic X" doesn't make sense

Bernard Meurer

@ACuriousMind It's because I'm a manifold homeomorphic to their hearts

0celo7

15:01

@BernardMeurer What?

@ACuriousMind Genau.

@BernardMeurer What?

Bernard Meurer

DON'T QUESTION MY GENDER

OPRESSION

MANIFOLDS LIVES MATTER

Slereah

"Breaking: NASA will admit to causing global warming with its gravitational engine! "

About time

0celo7

link?

Bernard Meurer

wut wut?

Slereah

godlikeproductions.com/forum1/message3099428/pg1?disclaimer=1

0celo7

15:41

@BernardMeurer I define my manifolds as Hausdorff.

You're not a real manifold

If you want to be special go with a Calabi-Yau manifold

Bernard Meurer

But that just sounds dumb

0celo7

@BernardMeurer but you have a trivial canonical bundle

Bernard Meurer

Are you complementing my ass?

0celo7

I don't know what your ass looks like

0celo7

16:01

@BernardMeurer If anything, since the canonical bundle is a line bundle, I'm saying your line is trivial

I.e. Small

yuggib

trivial means that it is ordinary and uninteresting

0celo7

@yuggib I know what it means

yuggib

@0celo7 it does not mean small

0celo7

@yuggib I know

What's your point

yuggib

3 mins ago, by 0celo7

I.e. Small

apparently you do not know

;-þ

Bernard Meurer

16:05

So you said I'm uninteresting?

</3

0celo7

Actually

yuggib

@BernardMeurer your line is

according to @0celo7

0celo7

a trivial fiber bundle is one which is globally a product

so what I said is that your line bundle is not twisted

which is probably a good, healthy thing

wtf, 1:51 radio edit

@Slereah how useful are jets and jet bundles in GR

cnn.com/2016/02/28/politics/donald-trump-white-supremacists/…

what

FenderLesPaul

16:22

@0celo7 pretty sure they aren't...

but fibre bundles are apparently

0celo7

@FenderLesPaul really

"fibre"

FenderLesPaul

@0celo7 although it's mainly because of Yang-Mills fields on curved backgrounds

so I guess it's not all that surprising or mind-blowing

but for completeness

0celo7

do you not see your crime

FenderLesPaul

arXiv:1511.00388

sorry

fiber

'murrica

0celo7

@FenderLesPaul I know that fiber bundles are useful

FenderLesPaul

16:24

@0celo7 no you don't

0celo7

@FenderLesPaul twistor theory is all about connections in spinor bundles and sheaf cohomology

FenderLesPaul

@0celo7 you sound like a crackpot when you say that

0celo7

HE uses bundles to prove the singularity theorems

FenderLesPaul

Also have I shown you (and others here) the Bob Waldemort video?

0celo7

@FenderLesPaul huh?

FenderLesPaul

16:25

I guess not

0celo7

@FenderLesPaul huh?

FenderLesPaul

Harry Potter and the Order of the Expansion

►

It's full of GR puns

so fucking hilarious

0celo7

that audience must be the nerdiest audience ever

what the hell

FenderLesPaul

Well yeah, it's UChicago.

That Killing field joke though

yuggib

that is a better classic...(that has already been posted here)

Finite Simple Group (of Order Two)

►

0celo7

16:29

the Unruh joke was too subtle for most of them

FenderLesPaul

It's probably too subtle for Unruh as well.

I wonder if Bob Wald was at that thing

and just cringing the whole time

0celo7

Wald seems like a cool guy

actually Zee seems like the famous physicist you'd go to for a line of blow

FenderLesPaul

@0celo7 Zee seems like the kind of guy who'd only work with you if you buy his books

@0celo7 yeah Wald does seem cool

are you interested in the problem of black hole stability/black brane stability at all?

and how it relates to thermodynamic stability of black holes/branes?

0celo7

@FenderLesPaul yeah, a little bit

I don't know enough PDE for it

GR stability analysis is on my list for my senior thesis topics.

but right now the main thing is twistors

or Cartan geometries

FenderLesPaul

I see

Sᴋᴜʟʟ ᴘᴇᴛʀᴏʟ

16:41

I didn't get the reference to The Who song at the end?

Meet the new boss, same as the old boss...

0celo7

@FenderLesPaul what do you see

that I'm a crackpot

my thesis will ultimately depend on if they'll let me do mathematical physics I guess

FenderLesPaul

@0celo7 yeah that you're a crackpot

0celo7

@FenderLesPaul has anyone used Seiberg-Witten to study the topology of spacetime and then looked at how the Einstein equations behave with strange topologies

@FenderLesPaul apparently one can construct a bundle on the conformal boundary of spacetime and do shit with it

FenderLesPaul

@0celo7 loop quantum gravity people might have

@0celo7 yes indeed

that's something I'm working on now

(bundles on scri, not Seiberg-Witten)

@0celo7 @ACuriousMind @Danu ironically, UChicago's GR class fucking sucks

DanielSank

@BernardMeurer I don't know anyone who knows all the things in that list.

However, those are very popular tools.

Bernard Meurer

16:54

@DanielSank What about any of those :p

0celo7

@FenderLesPaul why

I really want my adviser to teach a math GR course. No one in the math department cares about GR and the physics people would be scared by it.

FenderLesPaul

@0celo7 they only have a one quarter GR class (not even one semester)

and it basically just covers the first 6 chapters of Wald

which basically means you learn no GR at all

0celo7

oh UC

FenderLesPaul

Yeah at Chicago

Bernard Meurer

@DanielSank Fundamentally I'm just looking for someone who is a better/more experienced dev than I am so that I can ask a couple of tips about web dev

0celo7

16:57

IMO Wald sucks for chaps 1-6

ACuriousMind

@FenderLesPaul lol, welcome to the club ;)

0celo7

There are much better intros to GR

FenderLesPaul

@ACuriousMind what club? :p

0celo7

@FenderLesPaul shitty GR lectures

FenderLesPaul

@0celo7 I think the GR sequence at UCSB is pretty good though

0celo7

16:58

I was doing something

DanielSank

@user507974 For us, we need low temperature. "Low" means such that $k_b T \ll h f$ where $f$ is around 5 GHz.

We also need vacuum.

0celo7

Then I forgot what I was doing

DanielSank

But the low temperature helps with the vacuum quite a bit.

0celo7

What was I doing?

DanielSank

We also need to shield against incoming thermal radiation.

We take pains to do this, using special home-made filters.

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