Spooky quantum entanglement just got spookier.
Entanglement is a weird statewhere two particles remain intimately connected, even when separated over vast distances, like two die that must always show the same numbers when rolled. For the first time, scientists have entangled particles after they've been measured and may no longer even exist.
If that sounds baffling, even the researchers agree it's a bit "radical," in a paper reporting the experiment published online April 22 in the journal Nature Physics.
"Whether these two particles are entangled or separable has been decided after they have been measured," write the researchers, led by Xiao-song Ma of the Institute for Quantum Optics and Quantum Information at the University of Vienna.
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