/sci/ - Science & Math

Heisenberg uncertainty principle

>>5631748
wave equation
http://en.wikipedia.org/wiki/Wave_equation
babby problem from intro to quantum mechanics (the energy of a free particle is not quantized but it's an important jumping off point)
http://en.wikipedia.org/wiki/Free_particle

>>5631752
>>5631750
Thanks! I thought it had something to do with the Klein-Gordon equation or the Schrödinger equation, but what's the one at the very end?

>>5631758
same as the above but in 3 dimensions
http://mathworld.wolfram.com/SchroedingerEquation.html
mathworld.wolfram.com/Laplacian.html
http://en.wikipedia.org/wiki/Laplace_operator

>>5631770
Ok, thank you. Sorry for spewing my plebness on this board.

It's a joke, those equations are all nonsense.

He's presumably deriving the Schrödinger equation in his head.

If you don't understand it, you don't belong on /sci/.

>>5632486
But I didn't learn this in any of my bio classes.

>>5632486

>>5632486

Since my opinion is just as valid as yours, I declare that if you don't have a banana stuck up your ass, you don't belong on /sci/.

>>5631748
>http://en.wikipedia.org/wiki/Free_particle
He just does some basic unrelated electrodynamics, special relativity and quantum mechanics.

>>5632519

Why wouldn't you have a banana stuck up your ass?

It's the first part of the demonstration that 0.999999.... = 1

>>5632519
>Since my opinion is just as valid as yours

>>5632486
>Implying physics is the only /sci/ence
>Implying quantum mechanics is the only branch of physics

>>5632545
>laughing girls make my opinion more valid. Also, my mommy told me I'm special.

>>5632539
>Hey, banana-ass!

>>5632576
>jellymad because he doesn't understand OP's pic

Lurk more, high schooler.

>>5632621
>Thinks his opinion counts

Get over yourself.

>>5632637
>confusing facts and opinions

Go back to school, kid.

>>5632646
>Not having a banana shoved up your ass

gtfo

>>5632648
>puerile and grotesque shitposting

How old are you? 5?

>>5632657
>4chan not shitposting

Where the fuck do you think you are, son?

>>5632659
>implying every board is /b/

How new are you? Did you come here yesterday from memebase?

>>5632662
>implying every board isn't essentially /b/ only people just pretend it isn't.

How new are you? Did you come here yesterday from memebase?

>>5632657
>banana in ass
>grotesque

Are you a closet homosex?

>>5631794
Nope. You should be ashamed.

>>5632669
>another kindergarten level comment

Answer the question. How old are you?

>>5632676
>implying I give a shit about some faceless asshat on 4chan or what he thinks of me

You seriously need a banana up your ass before you can post here, it's surprisingly relaxing.

>>5632679
What went wrong in your mental development? Why are you so immature?

>>5632702
Why are you so uptight? Oh, right, it's the banana that you DON'T have shoved up your ass.

I'm seriously beginning to feel bad because you might be autistic and think you're winning a pointless argument with someone on the internet.

>>5632668
but they're not

you're clearly new

>>5632713
I'm trying to help you.

>>5632722

No, I'm trying to help you. Shhh... good night, sweet prince.

>>5632728
Give me insight in your mental processes. What is going on in the head of someone who posts like a 5 year old?

>>5632734
Yeah, nah, getting bored with how steadfastly you believe you're accomplishing something.

>>5632861
We're still on a science board and psychology is a science. Thank you for contributing lots of data to my study on cognitive deficiencies.

If you don't understand it, please leave /sci/.

>>5634376

>>5634376
this

wearing a tshirt of this -> i'm a killer?

>>5634376
I'm here to learn =X

>>5632871
>psychology is a science
>mfw

>>5634376
If you don't understand it, please leave /sci/.

>>5638103
>babby's first Lie theory

>>5638113
4/10

>>5637786
What did you learn?

>>5638077
Yes, psychology is a science.

>>5638113
> sees an "L"
> concludes entire bunch of formulas is merely about Lie groups

>>5631748

it's just a bunch of quantum physics shown out of context

>>5639551
>out of context

What context? Do you even understand the formulas?

>>5640354

yes actually, i do

I can't tell you what this means without knowing which math class you're in

bumpp

>>5640414
I'm taking a class on cuadratic equasions and I have to say they are much harder than topological protomodular algebras.

>>5640400
Prove it.

>>5639543
What is it?

>>5631750
No, that's not the Heisenberg uncertainty principle.

The middle part looks relativistic. Time dilation and energy-mass equality. I'm not recognizing the mirrored "6" greek letter.

>>5631748

Guys I want to major in taking derivatives because it's about small stuff and like.. atoms are small right? I could measure atoms and then go to that place where they shoot the atoms at each other and then measure them :3 is that a good plan?

>>5631748

Fucking lol'd hard at that picture. Whoever made it is a legend.

>>5646466
You're not familiar with partial derivatives?

>>5631748
http://arxiv.org/pdf/physics/0610121.pdf

>>5646466

That's not a greek letter, it's not in their alphabet.

Haha, oh wow. Thread full of retards?

The first eq is the wave equation, it follows up into Schrodinger equation with some seemingly unrelated derivations, and finishes with the time-independent solution to the Schrodinger equation, ie. particle in a box problem.

>>5647598

> Haha, oh wow. Thread full of retards?

> finishes with the time-independent solution to the Schrodinger equation, ie. particle in a box problem.

> equation contains time derivative

>>5647625

it looked like dx from the thumb...still stands though.

>>5646583
Nope. I'll go look it up.

>>5648359
http://mathworld.wolfram.com/PartialDerivative.html

>>5632871
No you're shitposting m8

>>5648363
Very informative, thanks

>>5650168
>7 hour old thread

>>5650170
>hour

Don't you mean day?

>>5651045
LEL

>>5647598
Time-independent means H is time-independent.

>this entire thread

>>5652074
lol'd hard @ the pic

>>5651054
What does "LEL" mean? Is it an acronym?

>>5631748

God I quantic shit. Being taught by a nice but hard to understand vietnamese is my fucking bane.

>>5654298
>quantic shit

OP's pic is just basic algebra. It doesn't even require any knowledge of QM. You should be able to understand it without knowing the Schrodinger equation.

>>5647598

Thank you, anon.

Partially restored my faith in this thread.

Isn't that limiting conditions for the Schrodinger Equations.

>>5654254
lel

>>5655392
>limiting conditions

What do you mean? It is the Schrodinger equation.

>>5655396
You did it again.

>>5632516
>>5632517
>>5632519
Who are you quoting?

It's not the full Schrodinger equation.

There is no potential term.

>>5659699
literally says (zero potential) right there, dumbass. it's a plausibility argument to "derive" the infinite square well schrodinger equation.

http://www.hindustantimes.com/HTNext/LifeAndUniverse/Russian-billionaire-plans-to-make-humans-immortal-by-2045/Article1-1036706.aspx

>Avatar A involves a person controlling a robotic human replica through a brain-machine interface (BMI), a technology that already exists. (By 2020)

This is a bit of a lie. The truth of it is that DARPA is currently working on a BMI as well, but no decent BMI currently exists. Now, within seven years I think we can all agree that such a thing is more than possible.

This next part is more interesting:

>The Avatar B, due in 2025, would involve transplanting a(n organic) human brain into an artificial body.

This, I think, is very possible, but not quite by the deadline he sets. First off, we know with an almost absolte certainity that a good BMI will be created by 2025, which is the first necessary step for "Avatar B", but what is also necessary is both 1. a synthetic body that functions at least as well as an orgnaic human body does and 2. a decent life support system that functions like the heart and lungs do today.

Well, as for the first point, we are already making some progress in that direction. Take a look at these 3 vids:

http://www.youtube.com/watch?v=_qUPnnROxvY
http://www.youtube.com/watch?v=LPxRrgyN0OI

And attach them to this body:

http://www.youtube.com/watch?v=1Em8Sh-tmSw

Now you officially have a crude body for the brain to be transplanted into today. Now, I'm not claiming it's perfect, and honestly there are still a LOT of problems with it, but this is just to prove a point that we can nearly do this today.

As for the second point, well, look at these:

http://www.youtube.com/watch?v=52N1spX_yvg
http://www.youtube.com/watch?v=zYjDuNJsa0E

Again, they're very crude, but they are still examples of how close we are to doing this today.

(1/2)

>>5659782
But it doesn't show any potential. The potential is left out.

>>5659782
So its not generalized, like the full Schrodinger equation would be. The Schrodinger equation can describe the evolution of contraventions in any potential, his final result is not the full Schrodinger equation.

But thanks for explaining the thing I already read.

>>5660689
>evolution of contraventions
wut

I meat wavefunctions

>>5660691
What's a contravention in physics?

>>5661311
I'd like to know this too.

>>5662084
>the undying cancer

check the archives faggots

>>5662090

I remember seeing this shit in solid state physics. I learned nothing from that class.

>>5632659
>>5632662
>>5632668
>>5632669
>>5632676
>>5632702
>>5632712
>>5632713
>>5632722
>>5632728

>>5662429
Ignore the trolls. They were trying to derail the thread because they can't into quantum physics.

>>5662101

^_^

>>5665855
>cancer

>>5665858
Nobelium Uranium!

>>5662101
Where did you get these statistics?

>>5631748
It is the wave function with some properties, the first one at the top left corner is just the equality formed due to the separation of the position and time variables, valid for distinguishable particles (like bosons and fermions) Then is just algebra to make it equal to the total energy of a relativistic free particle.
At the end is just the equation of an infinity potential well combined with the previous result.

It's pretty basic stuff, this is from a baby's first quantum mechanics course. Hell, in my university even IEEE sees this stuff.

>>5638103
dude, that was my multilinear algebra hw, thank you so much

>>5631748
how is this asinine thread still alive?

>>5669198
>how is this asinine thread still alive?
why would you ask something like that w/o using sage?
someone keeps bumping it about twice a day, often w/an asinine pic and then immediately deletes the post used to bump
http://archive.installgentoo.net/sci/thread/S5631748#p5631748

there are about 5 persistent threads right now on the board that all get bumped twice a day at about the same time every day... draw whatever conclusion you like

>>5669279
very interesting hypothesis

high quality bump

>>5669279
what's the point of using sage on /sci/ when a thread is already on page 0?

>>5670646
>what's the point of using sage

Not using sage bumps it, obviously.

>>5670652
Oh hey there sage.

This is your cousin "bump".

>>5670705
>sage's cousin bump
>not age

>>5670743
He didn't come...

>>5669279

....just came back from all that "cute science" fiasco, where an admin was bumping several homework / youtube bullshit threads several times a week to keep alive. I get that this is still a thing here?

>>5670789
>an admin

>>5670789
I have no idea what you're talking about.

>>5673110
>post quantumcat and then delete your shit bump, 2 times a day, errrrrrrrrrryyyyyyy day

>>5670753
he never left!

lol I posted it again

>>5674190
>lol I posted it again
you said it

how do I bump thread?

bump for science

This thread is proof /sci/ is even worse than /b/