The h Bar

danielunderwood

01:37

Are the vectors in SR a distinct mathematical object from the vectors in GR since SR vectors need to transform under Lorentz transformations and GR vectors have more general transformations?

Actually I guess they're all the same, just dependent on the metric being used

dmckee

02:25

I would describe them as a special case. Special relativity is general relativity in the limit of weak gravitational effects (i.e. flat space-time), so the four-vectors of special relativity are a sub-set of those in general relativity.

On the other hand it is a subset characterized by enough additional guarantees that it might be seen to warrant separate study.

vzn

02:56

@danielunderwood for an answer try looking at the vectors in here :) arxiv.org/abs/1603.07655

danielunderwood

03:07

Thanks I'll check out that paper. I've actually been wondering if there's anything like a modern view on ether theory and that looks like it may be in that direction

I think they may be the same as far as the question that was in my head. I struggled for a while to figure out what vectors and tensors are, only to realize that the mathematical notion is a bit different than the physical notion and was confused by jumping between the two without knowing. What I was wondering here is if a similar thing may be happening where physical vectors were different based on context. I think they may b…

vzn

03:46

@danielunderwood think your questions cut to the heart of the problem. there are ways of thinking of the GR vectors that are considered nonphysical under conventional wisdom but candidly, suspect conventional wisdom may be wrong. we've had several debates in the room on this subj, search transcript if you have some spare time. heres a recent related question to ponder, maybe somewhat inspired by similar considerations...

18

Q: Does light really travel more slowly near a massive body?

It is a routine problem for beginners in general relativity to calculate the coordinate velocity of light for the Schwarzschild metric. Starting from the metric: $$ ds^2 = -\left(1-\frac{r_s}{r}\right)c^2dt^2 + \frac{dr^2}{1-\frac{r_s}{r}} + d\Omega^2 $$ We use the fact that light travels on a ...

...

just had to share this with room, another tragic-yet-riveting story about unrestrained young testosterone? o_O Thailand cave search: Divers close in on missing soccer team / cnn

Secret

04:46

downvote for lack of detail — Secret 14 secs ago

Probably one of the most honest driven downvotes I have ever casted

John Rennie

05:44

Someone upvoted this? Really?

1

Q: What is a good vacuum that can go from carper to floor and can pick up pet hair w/o a problem?

Right now I have a Eureka light weight and it doesnt do me a bit of good. The fliter becomes clogged with pet hair before the canister is even 1/16 full.

vacuum home-experiment

Cows

07:31

Been coding all day yesterday . . on and off. Thinking about attempting some very very very very trivial baby in diapers math proof that I can't seem to do. Will spend some time thinking about it in the morning. For now, I will retire for the day . .

Anonymous

@ACuriousMind Thanks. josh's answer was helpful!

Anonymous

@JohnRennie Morning. I'm confused about a very basic QM thing. Is it possible to experimentally distinguish between two states $\Psi$ and $e^{i\theta}\Psi$?

Anonymous

Is it possible to detect the global phase?

John Rennie

You're asking two different questions.

The global phase is just a gauge because you can choose any origin for $\theta$ that you want.

But if you're asking whether you can detect a phase difference then of course you can.

Anonymous

@JohnRennie Yes, that's what I meant

Anonymous

07:45

What would be the experimental method for that?

Anonymous

Actually take something simple like $|0\rangle$ and $e^{i\theta}|0\rangle$

John Rennie

@Blue Young's slits?

Anonymous

Umm, how exactly? Say I have a qubit (using electron spin) in state $|0\rangle$ and another electron spin in state $e^{i\theta}|0\rangle$

Anonymous

Or you could use the differently polarized lights

Anonymous

Actually, I should explain the context of the question first maybe:

Anonymous

07:51

1

A: Why should state of the "control register" change in the Phase estimation algorithm?

Imagine you have an eigenvector $|u\rangle$ of $U$. If you have a state such as $|1\rangle|u\rangle$ and you apply controlled-$U$ to it, you get out $e^{i\phi}|1\rangle|u\rangle$. The phase isn't attached to a specific register, it's just an overall multiplicative factor. Now let's use a superpo...

Anonymous

DaftWullie says in the comment that there is no way to distinguish between a composite state $(|0\rangle)_A \otimes (e^{i\theta}|0\rangle)_B$ and $(e^{i\theta}|0\rangle)_A \otimes (|0\rangle)_B$

Anonymous

There is no physical difference. Think about it this way: what experiment would you do to distinguish the two? If there's a physical difference, there must be a way to distinguish them. — DaftWullie 58 mins ago

Anonymous

in The Classical Channel, 48 mins ago, by Blue

@DaftWullie Interesting. So, I can't think of any experiment to distinguish the "phase". But one thing which is still a bit of unsatisfactory to me: Why is it just that our failure to create an experiment which can distinguish the phase, dictate on which qubit that phase actually should be in? Why should physics depend on our restrictions at all?

Anonymous

in The Classical Channel, 47 mins ago, by DaftWullie

physics doesn't. quantum theory is our description of physics (as best we know it), and it doesn't contain the possibility to distinguish it. Perhaps there's a different theory that does permit it.

Anonymous

"Think about it this way: what experiment would you do to distinguish the two?" i.e. $(|0\rangle)_A \otimes (e^{i\theta}|0\rangle)_B$ & $(e^{i\theta}|0\rangle)_A \otimes (|0\rangle)_B$ ----- is that true, in the first place? That's why I asked the question about whether we can distinguish the presence of a phase difference

Anonymous

07:59

@JohnRennie I mean what we need to detect is not just the presence of the phase difference, but in fact the relative phase difference. That is, does qubit A have a phase of $e^{i\theta}$ w.r.t qubit B or does qubit B have a phase of $e^{i\theta}$ w.r.t qubit A

Anonymous

Such an experiment would help to distinguish between $(|0\rangle)_A \otimes (e^{i\theta}|0\rangle)_B$ and $(e^{i\theta}|0\rangle)_A \otimes (|0\rangle)_B$

Novalium Company

08:11

Guys, I was thinking about a voltage divider with a load (= resistor) and what we can do is sum the second resistor with the load resistor (which are in parallel) and we get an equivalent one, after that we can view the system as if there was no load and no current going out of the output?

Anonymous

@NovaliumCompany Why would there be no current and no load?

Anonymous

Can you draw the situation?

Novalium Company

Ok, let me simplify my question. If I wanted to build a voltage divider, where I have initial 9V and I want my load to receive 0.1A and 5V how can I do that? How can I calculate what resistors I would need?

(I made the numbers up (0.1A, 5V...), I don't know if they'll work)

Anonymous

$9 V = (1.5 A)R$

Anonymous

$R=?$

Anonymous

08:15

Trying to see if they can be put in series

Novalium Company

So first I find the resistance of the load?

ups

nvm.

Wait, my book explains that, let me read again and I'll come back after 5 mins.

Anonymous

If net resistance of load is less than 6 ohms it can be put in series with another resistance such that the net is 6

Anonymous

If it is more than 6, we'll have to device some other branching

Novalium Company

My book gives an example where load is taken into consideration but it talks about some 10 percent rule, $Vout = Vin\frac{R2}{R1 + R2}$ won't work anymore.. and it just gets complicated. The exercise is: You have a 10V supply, create a voltage divider to supply a load that is rated at 3V and draws 9.1mA.

Anonymous

It's rated 3V and draws 9.1 mA. Find its resistance first

Anonymous

08:25

Simple V=IR

Novalium Company

R = 27.3mOhms.

Anonymous

Fair, now solve for $r$ from $10 V=(27.3 m\Omega + r)(9.1 mA)$ I guess?

Novalium Company

What is that, why?

I now know the resistance of the load and the desired voltage.

And I need to find resistor values?

Anonymous

Sid

@NovaliumCompany are you sure about that calculation?

Novalium Company

08:32

No, my book says different...

My book says 330ohms.

for the load resistance.

Anonymous

If your load is $R_2$, then you need to find $R_1$

Sid

I ask because if the current is in mA, the Resistance is usually in kilo-ohms..

Anonymous

In the above diagram

Anonymous

@Sid Yeah, that calculation @NovaliumCompany did looks wrong

Novalium Company

@Blue we don't have R2 yet.

Anonymous

08:35

R2 is your load resistance

Anonymous

Which you calculated wrongly

Anonymous

8 mins ago, by Novalium Company

R = 27.3mOhms.

Novalium Company

no, I need to find R1 and R2. We know Rl.

Anonymous

@NovaliumCompany Can you show your circuit diagram? I don't know what $R_1$ and $R_2$ is supposed to mean in your context.

Anonymous

Novalium Company

08:36

taleri.files.wordpress.com/2014/02/… go to page 81.

Anonymous

Here there is no $R_L$ separately

Novalium Company

That's a wrong diagram then xD

The book is using some sort of 10 percent rule...

which is confusing even more.

Anonymous

So, basically their constraint is $I_2=0.1 I_L$

Anonymous

Now it's just solving a couple of simultaneous linear equations

Anonymous

08:42

Write down the KVL equations

Novalium Company

$I_2=0.1 I_L$ confuses me.

Why would you want your I2 to be 10% of IL?

Anonymous

Apparently it minimizes some power loss

Novalium Company

Can we first do an example without that complication?

(on the same diagram)

Anonymous

We'll have to do the math, to check if their claim is actually true

Novalium Company

So lets first calculated the resistance of the load?

Anonymous

08:46

@NovaliumCompany You could try, Unfortunately, I need to leave now. Anyhow, as far as minimizing power loss is concerned that rule doesn't seem accurate to me (you could ask on the main site though)

Novalium Company

Oh, ok. See you then :)

I'll have to leave as well.

Novalium Company

11:41

youtube.com/watch?v=JGXdi7XcQi8 At 17:36. What I don't understand is why if we want to keep the voltage at 3V across R2 (and Rload), why the resistance of R2 has to be 100 times less than the resistance of the load?

Secret

12:27

@Cows, you have became famous

Secret

12:58

newscientist.com/article/…

If reality is a pond, and particle are the ripples from the splashes, what exactly is water?

and moreover, how meaningful we can go down this rabbit hole before it ceased to be relevant

Semiclassical

13:44

hmm, test

$\mathbf{\sigma}$

dang, no boldface

$\sigma$

$\boldsymbol{\sigma}$---okay, that one works

bolbteppa

I have stupidly written \mathbf{\sigma}'s in my notes so much there's no way I would even try to fix them all to make them look better with the better \boldsymbol{\sigma}'s :(

What else am I doing wrong :p

Semiclassical

14:01

lol

i noticed it while typing up lots of $\boldsymbol{\sigma}\cdot\mathbf{a}$

I was originally doing $\vec{\sigma}\cdot\hat{a}$ (b/c a is actually a unit vector) but wanted to be able to write $\hat{A}=\boldsymbol{\sigma}\cdot\mathbf{a}$

though in retrospect I could've just done $\hat{A}=\vec{\sigma}\cdot\vec{a}$, since I'm already saying in the text that $\mathbf{a}$ is a unit vector

Here's a question, I guess. A simple but handy formula for a singlet state $|\psi\rangle$ is that $$\langle \psi | (\boldsymbol{\sigma}\cdot \mathbf{a})\otimes (\boldsymbol{\sigma}\cdot \mathbf{b})|\psi\rangle = -\mathbf{a}\cdot\mathbf{b}$$

What's the simplest way to prove that?

The proof I know uses the fact that the singlet state is rotationally symmetric to choose $\mathbf{a}=\hat{z}$, $\mathbf{b}=\hat{z}\cos\theta+\hat{x}\sin\theta$ without loss of generality

bolbteppa

Think I need to just replace \mathbf{•} with \boldsymbol{•} from now on for everything

Semiclassical

One then only has to show that $\langle \psi | \sigma_z\otimes \sigma_z|\psi\rangle = -1$ and $\langle \psi|\sigma_x\otimes \sigma_z|\psi\rangle=0$

@bolbteppa apparently \boldsymbol is a bit outmoded for Latex, actually:

331

Q: How can I get bold math symbols?

To make Latin-letter variables bold I can use e.g. \mathbf{a}, but while putting Greek letters or symbols such as \nabla inside \mathbf doesn't cause any errors or warnings, it also doesn't do anything else. What is the best way to make bold math symbols, in particular Greek letters and \nabla?

fonts math-mode symbols bold

that said, only \boldsymbol works in Mathjax

so that's what I"m using so that I cut-paste to/from here as necessary

hmm. if I write the above as $F(\mathbf{a},\mathbf{b})$, I can use antisymmetry of the singlet wavefunction to claim that $F$ itself is symmetric

not convinced that really helps tho

(I mean, there's an argument to be made that one must have $F(\mathbf{a},\mathbf{b})=f(\cos\theta)$. The fact that $F(\mathbf{a},\pm \mathbf{a})=\mp 1$ when $\mathbf{a}$ is a unit vector is then enough for a linear ansatz)

Anonymous

14:53

@Semiclassical An alternative to \boldsymbol is \pmb I think

Anonymous

Works in LaTeX

Anonymous

$\pmb{X}$

Anonymous

$\boldsymbol{X}$

Anonymous

Slightly different

Anonymous

287

A: How can I get bold math symbols?

The AMS Short Math Guide recommends the \boldsymbol and \pmb commands (and suggests that you use the bm package for the former to get a more powerful version than provided by amsmath).

Anonymous

14:57

Oh, it's given in this answer, lol

Semiclassical

$\pmb{\sigma}$

works here too

$\pmb{\sigma}$ vs. $\boldsymbol{\sigma}$

They're obviously not quite the same, but not in any crucial way

Balarka Sen

15:45

Aw mexico played too horrendously

enumaris

hmmm...left my NLP thing running over the weekend...somehow it paused midway through...odd

vzn

@Secret argh looks interesting thx for sharing, maybe aligned with fluid paradigm? alas, paywalled, can only read intro, otherwise have to subscribe yearly, looking to buy 1 issue online, seems their apple app wont currently download in US? & couldnt find it in barnes+noble nook. @#%& :( newscientist.com/app-download

Secret

For that particular link, the part that is cut off by the paywall is really just "reality as a pond and particles as ripples on it

so nothign in depth

vzn

@Secret did you read the whole article? lol got a link to work finally. this link "Download the app here: New Scientist Apple" fails for me because it says app is not available in US, but other link at bottom of page "get the app, download on the app store" downloaded their app. $5 per single issue. am thinking just gotta try this out because if JR says anything )( positive whatsoever about popsci content then thats a rare moment :P

Secret

I am subscribed to newscientist and hard copies are delivered to me

vzn

15:59

Dec 10 '17 at 17:40, by John Rennie

Anyhow, awaiting my attention I have:
1) an armchair
2) a glass of beer
3) this week's New Scientist

@Secret re "reality as pond, particles as ripples from splashes" did you ever look at this? vzn1.wordpress.com/2018/05/25/fluid-paradigm-shift-2018 am now gonna buy the issue just to read the article because of your tantalizing/ evocative paraphrase/ sound bite... o_O

Secret

but are we dealing with one kind of fluid, or every particle arises from the same fluid?

your blog had not say much on the nature of that fluid itself

Semiclassical

I'd appreciate the 'fluid paradigm' suggestion more if those suggesting it actually provided quantitative statements

vzn

@Secret its one fluid and all the "particles" are emergent. this is not entirely outlandish if diverse knowledge is stitched together/ dots connected.

@Secret the blog post and earlier ones are full of bazillions of refs.

Semiclassical

e.g. "the theory has this parameter in addition to the usual ones, and based on prior experiments we know that said parameter can't be bigger than X"

vzn

@Semiclassical they are given. see refs.

Secret

16:04

but why will we expect all quantum fields are emergent from the same source, is it because of unification?

vzn

@Secret unification is not yet understood. unification is not what physicists (currently) think it is. they are both wrong/ right, right now...

enumaris

unification

it's so hot right now

vzn

@Semiclassical that is somewhat LHC centric (and therefore, to a degree anthropomorphic) thinking. aka "looking for keys under the lamppost". am not entirely ruling it out. it has worked for very well decades, nearly a century even (looking at earliest particle colliders) but think its nearing end of shelf life.

Semiclassical

the hell it is.

John Rennie

@vzn the "how to think about particles" article is just a slightly garbled explanation of quantum field theory. There is nothing hydraulic about it.

Semiclassical

16:08

being able to say what the parameters of your theory are and how those parameters affect the predictions of your theory is not "LHC-centric"

enumaris

QFT

it's so hot right now

Semiclassical

it is the basic difference between a theory and an interpretation

vzn

@JohnRennie secrets summary ("triggering my spider sense") was entirely/ utterly "fluid paradigmatical".

John Rennie

@vzn your monomania is getting the better of you again

Semiclassical

the latter can be interesting to study (hence why I find Bohmian mechanics interesting) but one should not expect to 'test' an interpretation

one can use said interpretations as motivations to modify a theory (e.g. by introducing more physical quantities) and then test those

vzn

16:10

@JohnRennie lol, buy a ref you recommend and then you ding/ dis me in front of everyone. yeah, typical :( :P

Semiclassical

but if you can't test it, it's not a question of physics

John Rennie

@vzn I don't recall recommending any references. If you're referring to New Scientist it is effectively a comic. Fun, but not to be taken seriously.

vzn

@Semiclassical we have been thru this a lot. think there is "moth + flame" dynamic going on here. now conclude you dont really seem to delve deeply into the exact theory youre interested in. (am not predicting future here + saying it will never happen.)

Semiclassical

and, as usual, you assume that my unwillingness to agree with you signals my lack of knowledge

vzn

@JohnRennie lol just quoted you. guess you missed the big onebox there of your own words. opposite of egotism there? you had some other popsci refs lately.

Semiclassical

16:12

"awaiting my attention" = "authoritative reference" now?

John Rennie

@vzn I saw the quote, but that was just a statement of fact not a recommendation.

Semiclassical

That one likes watching Star Trek is not an endorsement of it as futurism

John Rennie

Though I suppose I would recommend New Scientist as a source of entertainment, though not as a way to learn about physics. It is irredeemably superficial.

vzn

@JohnRennie lol then for misinterpreting you there & getting ahead of your own words. guess noticed your other popsci n00b recommendations lately & got distracted.

Balarka Sen

vzn's reading of everything is so cursory and superficial that it's scary

5

a ten thousand vzns in the world could take over the scientific community with pseudoscience wikipedia fans

vzn

16:15

@BalarkaSen wow, its a complete tag team pile on now. lol at BS and his frequently expressed disinterest of Physics that rivals the legendary banished black sheep 0celo7

Semiclassical

@vzn how about you give me one, then. not a list. one that you can consider as credible

enumaris

getting a bit tense up in here

my attempts at humor have not paid off

vzn

@Semiclassical this is a game & dont feel like playing it right now. the refs are all laid out, dont think you are an ideal candidate to push the theory fwd right now. nothing personal, few such candidates exist anywhere right now.

Semiclassical

I was not asking for your endorsement as a candidate to push the theory forward

I was explaining why I find presentations on it frustrating

vzn

@Semiclassical you disendorse me repeatedly in the room.

Balarka Sen

16:18

Is paradigm shift just pie in the sky???

:thonk:

enumaris

wonder what I should do today...hmmm

2

vzn

@Semiclassical plz try to separate the frustration over the theory being incomplete (fyi shared by me too) with personal feelings wrt my own admittedly feeble attempts to complete it.

Semiclassical

and instead of pointing to a specific paper which would rebut my complaint, you just say "see refs"

Balarka Sen

$\exists$ references

John Rennie

@enumaris I would start by drinking coffee. That always works for me :-)

vzn

16:20

@Semiclassical there are so many refs in my blogs. you guys dont click on any of em and then tell me its all bogus. think your guys facile rejections are what is really bogus.

Semiclassical

mmm coffee

enumaris

I'm not a big coffee guy

John Rennie

WHAT!

IMPOSTER!! GET OUT!!

3

enumaris

D:

Balarka Sen

I am not a machine to turn coffee into theorems.

enumaris

16:21

my body is a temple bro, I don't put mind-altering substances in my body

(not really...but I just don't drink that much coffee lol)

John Rennie

On one of the SEs someone asked why academics drink so much coffee. But I've lost the link.

enumaris

my adviser drank plenty

Secret

11

Q: Why do academics drink so much coffee?

A mathematician is a device for turning coffee into theorems -- Alfréd Rényi All the universities whose staff lounges I've been to have had coffee machines with free coffee. I've seen academics refer to "coffee breaks" instead of tea / juice / cookie breaks etc. I've also witnessed one acade...

academic-life

John Rennie

Aha! :-)

The spoilsports have put it on hold :-)

Semiclassical

the signal-to-noise ratio of the world is exhausting at times

Balarka Sen

16:23

I recommend a cup of ambition over a cup of coffee

Or a cup of motivation

Whichever flavor you prefer

Secret

and that chaos will only become bigger as The Iluminati works behind the scenes

enumaris

I just drink water...

and some lemonade and water

vzn

← finds trying to overcome experts cognitive biases/ groupthink exhausting

John Rennie

@enumaris I wouldn't do that, fish wee in it

enumaris

sometimes some root beer or ginger ale

or tea

Secret

16:24

Eventually, The Iluminati will liberate all humanity from a world ruled by the iron fist of classical determinism

enumaris

@JohnRennie no drinking water? :P

Secret

I drank apple juice

John Rennie

@enumaris either put alcohol in it to sterilise it, or boil it - in which case you might as well add some coffee :-)

enumaris

@vzn maybe it's not congnitive bias if it's backed with evidence

vzn

← now musing with idea of taking up tequila early in morning

Secret

16:26

Top 5 Coffee Cocktails Best Alcoholic Coffee Drinks

►

enumaris

@vzn with some lime and salt, it's quite good

Secret

now, sprinkle that with some marijuna and you have a recipe for a wild trip

vzn

@enumaris lol much less hassle than Physics metrolyrics.com/margaritaville-lyrics-jimmy-buffett.html

enumaris

I lick salt, drink tequila, then suck on a lime

John Rennie

@BalarkaSen I knew I'd heard that somewhere before. It's from "9 to 5" by Dolly Parton.

vzn

16:28

@enumaris lol, all dogma is utterly backed by "evidence"

John Rennie

@BalarkaSen ooh, you country and western fan, you :-)

Balarka Sen

@JohnRennie Correct, in turn parodied by my boy Aesop here.

enumaris

my philosophy is only, if two theories make the same predictions, use Occam's razor. If they don't make the same predictions, test it out, if it can't be tested...drink tequila

Balarka Sen

Nah I knew it was from that song by digging through the lyrics of that song I linked

Semiclassical

Well, the tricky thing is what it means to "test" the predictions when the theory has adjustable parameters

John Rennie

16:31

@BalarkaSen those lyrics ... what was in that coffee?

Balarka Sen

Aesop Rock is a true poet

vzn

> Feynman tried marijuana and ketamine at John Lilly's famed sensory deprivation tanks, as a way of studying consciousness.[123][124] He gave up alcohol when he began to show vague, early signs of alcoholism, as he did not want to do anything that could damage his brain.[125] en.wikipedia.org/wiki/Richard_Feynman

enumaris

@Semiclassical sounds like a good excuse to drink more tequila

Semiclassical

In that case what you test is not so much "is the theory true or false" but "is the theory true with parameter X in a given testable range"

Balarka Sen

Hard to find rappers like him out there

Semiclassical

16:32

@BalarkaSen one dark coffee f*** you PEACE

Balarka Sen

"large" not "dark" but yeah

gr8

Sid

@BalarkaSen Brazil won. duh.

Semiclassical

damn, you're right

Balarka Sen

@Sid Yeah Mexico played terribly

Sid

Now. Let's go Inazuma Japan!

vzn

16:33

@enumaris lets start a new drinking game where everyone takes a shot whenever someone says fluid or paradigm (ps this line counts as 2) :P

Balarka Sen

Their ball slipped from the toes near the penalty region

Ochoa was still great as usual

Semiclassical

@vzn stop trying to get us drunk. /s

John Rennie

@Sid England will play Japan in the final. You heard it here first.

enumaris

sounds legit

Balarka Sen

LOL

@Semiclassical I have listened to his stuff so much over and over again for the past few months that I remember most by heart.

Semiclassical

16:34

lol

enumaris

France seems to be doing quite well, they knocked out Argentina with some sick goals

Uruguay also

Semiclassical

tbh I could remember that line in my head and thought I had it right

though I remember the JD part of that song more clearly, for obvious reasons

Balarka Sen

Yup, Darnielle is amazing at the end

Great, great song

John Rennie

@Semiclassical John Duffield wrote a song??

Balarka Sen

LOL

Semiclassical

16:35

haaaah

yes, of course, that's exactly what I meant :P

vzn

@Semiclassical lol sounds more like JR to me chat.stackexchange.com/search?user=37155&q=beer

Balarka Sen

I think the greatest song by Aesop, if I am to judge by lyricism, is

Aesop Rock - Gopher Guts (Official Lyrics)

►

John Rennie

Stop that cheerin' and get another beer in

Balarka Sen

This is literally unreal.

John Rennie

I thought Captain Beefheart was the main man for random lyrics, but I can see I was wrong.

Emilio Pisanty

16:38

@JohnRennie what do you make of this? physics.stackexchange.com/questions/414758/…

also any other 10k'ers around

Semiclassical

@EmilioPisanty 404

Emilio Pisanty

@Semiclassical hence the ping to the JR and 10k'ers ;-)

Semiclassical

ohhhh

Emilio Pisanty

deleted by OP

Semiclassical

yeah, makes sense now

John Rennie

16:40

@Semiclassical it's a question about this paper

Emilio Pisanty

> para todo mal, mezcal; para todo bien, también

Semiclassical

mmm, berry curvature

John Rennie

It asks how angular momentum can be quantised for a free particle.

Emilio Pisanty

@Semiclassical now undeleted

Semiclassical

thx

really? that gets starred?

Balarka Sen

16:44

is tempted to star

Emilio Pisanty

@BalarkaSen indeed

Semiclassical

ugh

Balarka Sen

rip semiclassical

the stars that shine over the sky are too chaotic for you

Secret

When vitamin D taste like alcohol, you knew something is going wrong

Balarka Sen

¿

Secret

16:49

chemistwarehouse.com.au/buy/83022/…

ACuriousMind

Looks like it's time for star cleanup in aisle 71

Semiclassical

oh thank goodness

ACuriousMind

Huh. I didn't even do anything :P

Balarka Sen

Something trolly this way comes

vzn

← lol belated delight in sheer irony/ double meanings of phrase, has nice ring to it, maybe should throw it around more myself... irredeemably superficial

Constantine Black

16:52

Hi to all. Could I ask for opinions, if anyone cares to give, about a possible transition from a physics bachelor to a theoretical mathematics(algebra, diff. geo.) master? Any thoughts are welcomed.

ACuriousMind

@ConstantineBlack If you want to do it, do it, but be sure that you know what you're getting into by taking some pure math classes ahead of time

John Rennie

@ConstantineBlack I think Danu did that. You might want to ask him about his experience.

enumaris

alright, I better do some coding

drinks tequila

danielunderwood

Better have some beer with that tequila

enumaris

I see a fight with IT looming in the future

I need to get local admin rights for my PC and dual boot to linux...they aren't gonna be happy about it

FIGHT

John Rennie

16:56

@enumaris Is it Windows 10?

enumaris

yeah it's currently windows 10

Emilio Pisanty

@ConstantineBlack ... and give a thought to what you will want to do with that degree once you have it.

enumaris

I kinda doubt they will let me dual boot

John Rennie

@enumaris you can run Ubuntu in Windows using the Linux subsystem. It works really well.

enumaris

what's that mean?

is that like dual booting?

I need CUDA support

Constantine Black

16:58

@ACuriousMind Well, I' m currently reading geometry of surfaces and I have read algebraic structures(groups and some representations, rings, homomorphism theorems). I still need more analysis though to get to the exams.
@JohnRennie Well, where could I find him?
@EmilioPisanty Currently I'm thinking of it as a step to mathematical physics.

John Rennie

Ah, I'm not sure if the Windows unix subsystem supports CUDA ...

danielunderwood

@enumaris That's the thing I linked to a while back

enumaris

is it like a virtual machine?

I can't recall the link..

danielunderwood

Similar, but more integrated with windows

enumaris

I see... hmm

Transcript for