/sci/ - Science & Math

>>11574503
bible

>>11574558
jew

>>11574503
One is a proper physical theory, the other is mathematically nonsensical.

bump

>>11574503
Many world's interpretation of quantum mechanics.

>>11574503
Luminiferous aether density variation.

>>11574914
What?

>>11574914
Popsci meme created to protect muh free will

>NOOOOOOOOOOOOOOOOOOOOO YOU CAN"T JUST SAY THAT IT IS LIKE THAT YOU SHOULD BE ABLE TO QUANTIFY IT. REEEEEEEE WHERE ARE THE GRAVITINOOOS

>>11574867
>One is a proper physical theory, the other is _physically_ nonsensical.
FTFY

LQG is better than string theory but both are wrong and more importantly GRT is wrong

>>11575673
>GRT is wrong
Brainlet.

>>11575696
>GRT isn't wrong
Ultra brainlet.

>>11574867
> LQG : violates basic physical facts such as Lorentz invariance

>String theory: doesn't violate modern physical principle

> Ultra-brainlets in /sci/ who are confused with even high school math: ooga booga STRING THEORY BAD!!!

>>11576633
Which of the 10^500 string theories is your favorite anon?

>>11575699
>trolling outside of /b/
No, it's definitely you.

>>11576640
which planet orbit is the correct one?
hurr durr
gravity doesn't isn't can't won't

Big bang theory is hilarious man

>>11574503
Newtonian mechanics. Leptons don't exist.

>>11574503
Loop quantum gravity is better as a theory imo because it poses far fewer news things than string theory. moreover, string theorists have seen several defeats in the past years including the observation of a positive cosmological constant and the absence of super symmetry at the LHC.

LGG literally just rewrites Einstein's equations in a coordinate system where it is easy to do the canonical quantization.

of course lqg has its problems. the cosmological sector lqc for instance doesn't satisfy certain consistency conditions.

there are also other approaches to quantum gravity worth considering: causal dynamical triangulations and causal sets for example. There's also wolfram's meme theory now.

Negative?

>>11574503
Positive?

>>11574503
string theory all the way, there is a reason why it dominates high energy theory and why all the smartest people gravitate towards it

>>11576837
brainful post

>>11576945
the high energy people like to study string theory because it's motivated from particle physics. GR people like LQG because it is motivated from GR.

please don't use the band wagon fallacy to decide between two theories.

>>11576958
>GR people like LQG because it is motivated from GR.

Not really, LQG in general is a very minor area of study compared to ST. Putting them on an equal footing is very disingenuous.

>>11576928
You seem pretty up to date with those issues, what is your background in physics? What books would you recommend me to understand the relative merits of the current theories of gravity (I got a masters in mathematics but haven't done physics since undergrad)?
What do you think of Verlinde's theory of emergent gravity?

>>11574503

>>11576966
>What do you think of Verlinde's theory of emergent gravity?
meme

>>11574503
>Astrology or turtle parapsychology

>>11576966
I have a PhD in theoretical physics. I'm doing a post-doc now.

Martin Bojowald has a nice popular science book: Once before time. It's not cringy like a lot of other popsci books, and has a broad overview of string theory and lqg.

For getting a picture of the landscape of quantum gravity theories this arxiv paper is very useful: 1708.07445

Carlo Rovelli also has a nice series of lectures on youtube that are easy to follow. Just search Carlo Rovelli lecture and the playlist is the first result.

Abhay Ashtekar has a nice intro on the arxiv: 1201.4598

I don't know much about string theory besides what I've heard in seminars and read on the internet. If you ever want to learn something though, just go on the arxiv and search Introduction to... and you'll usually get something palatable. Also paperscape is a good way to efficiently explore the arxiv because it shows you directly which papers got the most citations.

>>11577015
>go on the arxiv and search Introduction to...
This alone was very valuable to me. Thanks. I didn't know there were so many "overview" papers in arxiv.

>>11577015
>I have a PhD in theoretical physics
>I don't know much about string theory

I am afraid you have been had m8

First things first. Why is there a quantum entaglement drawing in the picture? Are you autistic? Now let's talk about your question. If you are not Michio Kaku then there is absolutely no reason no be a supporter of QLG. String theory is has way more potential and space for improvement. Plus it's more lkely to me proven because it doesn't need some crazy expensive expirement. I don't know like building a BLACK HOLE!!! or you know trying to expiriment with kugelblitzes.

>>11577057
So you don't know shit about either, noted.

>>11576633

Somebody who doesn't understand physics alert. : p

Lorentz symmetry doesn't have to hold true at all scales. We only know it works up to roughly the TeV scale experimentally so you can suck a fat cock.

>>11574503
non commutative geometry and operator algebra. way better

I'm just passing by. Are gravitons proved yet?

>>11577129
Nope.

>>11574558
BASED

>>11577139
...on goat-fucking

>>11574503
no. electromagnetic spectrum gravity. you have 1 strong force at that point. much like say visible light is part of the electromagnetic spectrum gravity is as well. how does it work? you counting electrons orbiting atom nucleous...es...is..zzzz...?... they are in motion and small enough to interact with the higs field or possibly just from their motion a field is created and it links with all others that are close enough which happens to be almost touching to touching. the math is different but the effect is the same.

now you might say your stupid and this makes no sense what of the inconsistencies in atomic weight? and i would say it comes from more complicated orbital patterns and simply more electrons within a set volume thats small causing a sort of dynamo esk effect in the higs field... or something... probably something

>>11577281
Can you start namefagging so I can filter you? Thx.