[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 136 KB, 600x594, C6B12C30-0B66-4268-B601-171F27CCC573.jpg [View same] [iqdb] [saucenao] [google]
11229289 No.11229289 [Reply] [Original]

is gravity a tensor boson

>> No.11229292

>>11229289
yes, the graviton is the spin-2 boson corresponding to the rank-4 stress-energy tensor

>> No.11229311
File: 438 KB, 1653x1329, 8F44F71E-0E6B-4205-B276-4D6071B80BEE.png [View same] [iqdb] [saucenao] [google]
11229311

>>11229292

>> No.11229332

>>11229292
there can be antigravity particles

>> No.11229340
File: 7 KB, 280x180, B917728A-0C7E-4F59-8758-376A8E8576DF.png [View same] [iqdb] [saucenao] [google]
11229340

>>11229292

>> No.11229342

>>11229332
yes there can be in certain theories which have absolutely no empirical support. lots of things are possible in the imagination land of theorists, but most of the time they are contradicted by reality and this idea is a great example

>> No.11229345
File: 146 KB, 1992x1280, C89BAB3C-0B3C-4F41-9BFD-784044A5BA4D.jpg [View same] [iqdb] [saucenao] [google]
11229345

>>11229342

>> No.11229347

>>11229340
where did you find this pseud shit? gotta keep my inventory of crackpot ideas up to date

>> No.11229349

>>11229347
name at bottom, from his twitter

>> No.11229361
File: 208 KB, 1005x408, TIMESAND___particles.png [View same] [iqdb] [saucenao] [google]
11229361

The graviton would be the quantum force carrier of the gravitational force if such a thing existed, but Einstein proved that there is no gravitational force and that gravity is the result of the action principle in curved spacetime. Therefore, there is no reason to think the graviton exists. It would be different if gravity was a force because then you could expect to have a quantized force carrier like the EM, strong, and weak forces, but since gravity is not a force there is no good reason to think it is a force with a quantized force carrier. That directly contradicts Einstein's demonstration that gravity is only the curvature of spacetime.

However, if the likelihood of your grant application depends on you thinking the gravitational force has a quantized force carrier called a graviton, then that is also a good reason to think that the graviton exists but this is an economic rather than scientific reason to believe it. I myself do not believe the graviton exists because only forces have quantized force carriers and gravity is not a force.

>> No.11229373

>>11229311
>top
>bottom
lol that generation of quarks is gay.

>> No.11229374

>>11229361
https://en.m.wikipedia.org/wiki/Geodesics_in_general_relativity

>> No.11229381

>>11229361
this is a good undergrad-level post and maybe there is some truth to it. maybe spacetime transcends quantum stuff; roger penrose has argued this.

but the idea is contrary to the idea that all fields (all the four forces) must be quantized in order to obey quantum mechanics. the penrose idea seems to say that there is a special exception to quantum mechanics granted to gravity. that sounds strange.

in string theory the concepts of space and time emerge from the underlying quantum string theory and all forces follow the same rules. that seems a bit more logical