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Submission + - A Laser to Rip a Hole in Spacetime? ( 2

astroengine writes: "Those pesky physicists are at it again; they want to build a laser so powerful that it will literally rip spacetime apart. Why? To prove the existence of virtual particles in the quantum vacuum, potentially unravel extra dimensions and possibly find the root of dark matter. The $1.6 billion Extreme Light Infrastructure Ultra-High Field Facility (known as ELI) will be built somewhere in Europe by the end of the decade and physicists are hoping the ten high-powered lasers — delivering 200 petawatts of power at a target for less than a trillionth of a second — will turn up some surprises about the very fabric of the Universe."
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A Laser to Rip a Hole in Spacetime?

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Be careful when a loop exits to the same place from side and bottom.