What is EINSTEIN-ROSEN BRIDGE??Explain briefly.
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That's basically a wormhole. You know about wormhole na?!
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ya
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Einstein Rosen bridge is a consequence of theory of relativity.
It states the possibility of small wormholes in the universe or "spacetime" more accurately.The tunnel so created will act as a way that can allow us to travel in space and time to another corner of universe. Think of a paper with points on its extremities, now fold the paper as the two points as conciding, so in place of going from one point to another, you can directly go through the paper at the point where the two points concide, hence cutting down the travel distance by a very large amount. Now just think of the paper as the universe and the two points as two galaxies trillions millions of light years away, instead of covering all the time that would take billions of years, we can straightaway go there through the wormhole.
This wormhole is extremely unstable and requires immense amounts of energy . It is also extremely small. I think of it as bending paper in half and falling through one side to the other. This would require something with enough mass to attract the other side of the universe and pinch a wormhole into it so you have a traversable hole. Another problem is that you couldn’t control where you go. It is thought that it may not be possible to convert a wormhole into a time machine in this manner; some analyses using the semi-classical approach to incorporating quantum effects into general relativity indicate that a feedback loop of virtual particles would circulate through the wormhole with ever-increasing intensity, destroying it before any information could be passed through it, in keeping with the chronology protection conjecture
And yes, if you use a wormhole with one end accelerated, when you enter from accelerated end you can return to past. Of course if it doesn't collapse.
But still this wouldn't be exactly like back to the future. For example you cannot return to a moment when the wormhole didn't exist.
It states the possibility of small wormholes in the universe or "spacetime" more accurately.The tunnel so created will act as a way that can allow us to travel in space and time to another corner of universe. Think of a paper with points on its extremities, now fold the paper as the two points as conciding, so in place of going from one point to another, you can directly go through the paper at the point where the two points concide, hence cutting down the travel distance by a very large amount. Now just think of the paper as the universe and the two points as two galaxies trillions millions of light years away, instead of covering all the time that would take billions of years, we can straightaway go there through the wormhole.
This wormhole is extremely unstable and requires immense amounts of energy . It is also extremely small. I think of it as bending paper in half and falling through one side to the other. This would require something with enough mass to attract the other side of the universe and pinch a wormhole into it so you have a traversable hole. Another problem is that you couldn’t control where you go. It is thought that it may not be possible to convert a wormhole into a time machine in this manner; some analyses using the semi-classical approach to incorporating quantum effects into general relativity indicate that a feedback loop of virtual particles would circulate through the wormhole with ever-increasing intensity, destroying it before any information could be passed through it, in keeping with the chronology protection conjecture
And yes, if you use a wormhole with one end accelerated, when you enter from accelerated end you can return to past. Of course if it doesn't collapse.
But still this wouldn't be exactly like back to the future. For example you cannot return to a moment when the wormhole didn't exist.
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