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Scientists build the smallest quantum computer in the world — it works at room temperature and you can fit it on your desk
The smallest machine of its kind in the world uses a single photon as its qubit and it can perform calculations without needing the cumbersome equipment to cool it down to near absolute zero.
The machine is powered by just one photon, or light particle, embedded in a ring-shaped optical fiber, the scientists wrote in a study published Sept. 3 in the journal Physical Review Applied. It is also more efficient to run than systems using trapped-ion qubits — charged particles suspended in free space by electromagnetic waves — which require complex lasers to precisely tune their quantum state. Given the machine uses a photon as its qubit, it could easily be integrated into future quantum communication networks that use light to transmit data, or with other light-based classical computing systems, the scientists said.
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