White Holes

[Shadow]

So I was reading about white holes being the theoretical opposite of black holes. This kinda blew my mind. A hole that repels and possibly spews out matter? It seems however that these holes break the 2nd law of thermodynamics yet meet einstien field equations. Can someone help me to understand how exactly these holes can exhist?

[l0rca]

I'd like to know how General Relativity justifies this.

Also, I'd like to see what you've been reading.

[Fnord]

I wish I could remember where I read this, so I don't know if it's real science or pseudo-science (woo), but here goes...

Allegedly, white holes exist on the "other side" of a black hole and are connected to those black holes by a one-way wormhole. The two ends of of the wormhole may or may not be in the same universe. The two ends may or may not co-exist at the same time.

[Ziggurat]

Satisfying the field equations doesn't mean they can or do exist. Black holes satisfy the field equations, but more than that, we can figure out from the field equations how they can form. We do not know of any process by which white holes can form, and the fact that they satisfy the field equations doesn't necessarily mean that there's any mechanism to form them which also satisfies those equations. They are, practically speaking, a mere mathematical curiosity at this point.

[Shadow]

I'd like to know how General Relativity justifies this.

Also, I'd like to see what you've been reading.

http://en.wikipedia.org/wiki/White_holes

http://www.space.com/scienceastronomy/white_hole_030917.html

[Shadow]

Satisfying the field equations doesn't mean they can or do exist. Black holes satisfy the field equations, but more than that, we can figure out from the field equations how they can form. We do not know of any process by which white holes can form, and the fact that they satisfy the field equations doesn't necessarily mean that there's any mechanism to form them which also satisfies those equations. They are, practically speaking, a mere mathematical curiosity at this point.

Yes, I understand the theoretical physics point of view but many theories (i.e. string theory) have alot of math behind them that seem to be accepted by the theoretical community.

Is such little discussed/theorized about white holes beause they break the second law of thermodynamics?

[Shadow]

I have a bunch of ideas surronding gravity/antigravity & black holes along with these white holes I recently read about now makes my ideas more likely. As white holes would be an active form of anti-gravity repeling matter. However unlikly as they would appear to break some laws... those theoretical rebels.

[Ziggurat]

Is such little discussed/theorized about white holes beause they break the second law of thermodynamics?

No, I think they're not discussed because hardly anyone expects that they actually exist, because nobody has any concrete ideas of how they could form. There was actually quite a bit of resistance to the idea of black holes, but there the mechanism for formation is quite clear from the theory (and the likelihood that such conditions would be met in the real world), and that was critical in their eventual widespread acceptance and interest.