Triple entanglement in silicon marks major quantum computer breakthrough

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Quantum computers could one day outperform traditional machines, but hurdles remain. Now physicists have successfully entangled three silicon quantum dots for the first time, in a breakthrough that could help make quantum computers more practical.
Quantum computers could one day outperform traditional machines at many types of tasks, but hurdles remain. Now, physicists in Japan have successfully entangled groups of three silicon quantum dots for the first time, in a breakthrough that could help make quantum computers more practical.

Quantum computers tap into the weird world of quantum physics to drastically boost the processing power and speed of computers. Information is encoded in quantum bits (qubits) in a similar way to the bits in traditional computers, except that qubits can be manipulated in a few unexpected ways.

One of these is quantum entanglement, which describes the phenomenon where groups of particles can become so intertwined that if you check the properties of one, you can not only infer that property of its partner (or partners) but actually influence it, no matter how far apart they may be. Einstein himself was baffled by the idea, referring to it as "spooky action at a distance" and originally took it as evidence that models of quantum mechanics were incomplete.

In the context of quantum computers, entangling qubits allows data to be transferred through them and processed much faster, and improves error correction. Most of the time qubits are…
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