Could physics experiments rip space time?

[lucaspa]

Yesterday at 02:36 PM webboffin said this in Post #8

I want to know about smashing particles and creating other exotic particles and increasing energies being used to do so.
Could in tens of years time physists cause a dimentional collapse of space time even if localised. What are the known and unknown about it?
Does physics know the math of producing such phenomina or can safely discard it for years to come?

Gentu has some of it.  As I understand it, the energy required to form even a mini-black hole is orders of magnitude more than all the generating plants on the planet can produce. Again, I'm not sure the 4 dimensions of spacetime can be "collapsed" or ripped, even theoretically.

I still have to caution you, there are few safety certainties in life.  Even knowing the math as we do know is not an absolute guarantee.  The discovery of switching neutrinos has shown that.  The Standard Model of Particle Physics looked very solid, but the new data on solar neutrinos showed that it wasn't correct.  There is always the possibility that, even tho the calculations show it absolutely safe, something unforseen will happen because the theory on which the calculations was based was in error.

Life is risky.  Get used to it.

 

[lucaspa]

Yesterday at 06:34 PM Yinlowang said this in Post #13



Large Hadron Collider
http://lhc-new-homepage.web.cern.ch/lhc-new-homepage/

I believe one of the outcomes expected from the LHC is Producing alot of mini black holes.

Yup here is a small story about it.

http://unisci.com/stories/20014/1001012.htm

Edited bacause I cannot spell

The key point here is:

"A black hole produced in this way would quickly decay, not in the usual particle way but in a furious burst of Hawking radiation. "

By "quickly", they mean fractions of a second, long before such a small black hole could absorb more mass.  The event horizon of such a hole is going to be smaller than an atom.




 

 

[lucaspa]

Yesterday at 07:50 PM DNAunion said this in Post #16

DNAunion: Did a quick Google search and found this right off the bat.

Thank you. Now, the only problem is that no one knows if string theory is correct.

 

[gentu]

Yes, like some others have said, mini black holes are no problem. The lifetime of a black hole is directly related to how much mass it contains, and to sustain itself, a black hole must be drawing in more matter than it releases. Black holes form naturally when huge dying stars implode, supplying a large amount of initial matter. These black holes will eventually decay through Hawking radiation. The only dangerous black hole that could be produced on our planet would be one that draws in surrounding mass faster than it evaporates.

The good news is, even if we could somehow convert all the matter on Earth into energy, it would likely still not be enough energy to produce such a black hole.

 

[Osiris]

Is it proved that dying stars create black holes though? or is it just a theory?  Because if it is proved, then those blackholes are still small, (but bigger than those that we could create IF we were able to) still wouldn't do harm(or harm only to things really nearby)

 

[gentu]

I'm not sure Osiris, but I think that there is some evidence that black holes have been formed in the remenants of supernovae. These black holes are usually several solar masses, because it takes a substantially large star to form them.

 

[Yinlowang]

Today at 04:59 PM lucaspa said this in Post #22

The key point here is:

"A black hole produced in this way would quickly decay, not in the usual particle way but in a furious burst of Hawking radiation. "

By "quickly", they mean fractions of a second, long before such a small black hole could absorb more mass.  The event horizon of such a hole is going to be smaller than an atom. 
 

Yes, I know that.  I was responding to someone that said we probably could not create a singularity.  The LHC may be able to ever so briefly create them.  The neat thing about it is we will be able to test if Hawking radiation(Virtual Particle Production arround a black hole, which is what makes them decay) is true. 

 

[DNAunion]

Lucaspa: I don't think spacetime can be ripped. It's a fun science fiction plotline and makes some great stories, but I haven't seen any theoretical ideas about how that could be done.

DNAunion: … Did a quick Google search and found this right off the bat.

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"Superstring theory resolves the most enigmatic problem of twentieth century theoretical physics: the mathematical incompatibility of the foundational pillars of quantum mechanics and the General Theory of Relativity. In doing so, string theory modifies our understanding of spacetime and the gravitational force. One recently discovered consequence of this modification is that spacetime can undergo remarkable rearrangements of its basic structure requiring the fabric of spacetime to tear apart and subsequently reconnect. Such processes are at best unlikely and probably impossible in pre-string theories as they would be accompanied by violent physical effects. In string theory, on the contrary, these processes are physically sensible and thoroughly common." (http://www.lassp.cornell.edu/GraduateAdmissions/greene/greene.html)
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Lucaspa: Thank you. Now, the only problem is that no one knows if string theory is correct.

DNAunion: At least now you know that there are some "theoretical ideas about how that could be done".