A new semiconductor-based technique for entangling multiple electrons could mark a significant step towards the development the first
fully-functional quantum computer.
Roberto Merlin and colleagues at the University of Michigan, along with Jacek Furdyna of the University of Notre Dame in Indiana, used ultra-fast
laser pulses to entangle three electrons in a quantum well made of semiconducting cadmium telluride.
Most schemes for entangling multiple quantum bits, or qubits, have involved ions or photons and have used complicated laboratory set-ups. By contrast,
the new scheme uses electrons, the building blocks of conventional computers. Also, although others have entangled two electrons, entangling more
qubits is crucial to developing an effective quantum logic circuits.
"Most papers on quantum computing are theoretical, we proposed the method and show that it works," Merlin told New Scientist.
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