Scientists who have thrown a single atom from one pair of optical tweezers to another say that the feat could be used to build better quantum computers.
Scientists using tiny optical tweezers have played the world's smallest game of catch — throwing and catching individual atoms using light.
The feat, achieved with highly-focused laser beams that held atoms in place before launching them, is the first time that atoms have been thrown from one pair of optical tweezers to another. The researchers describe the achievement in a paper published Mar. 9 in the journal Optica . "The freely flying atoms move from one place to the other without being held by or interacting with the optical trap," co-author Jaewook Ahn , a physicist at the Korea Advanced Institute of Science and Technology in Daejeon, South Korea, said in a statement ."In other words, the atom is thrown and caught between the two optical traps much like the ball travels between the pitcher and a catcher in a baseball game.
The physicists say their demonstration could be used to develop faster quantum computers capable of switching out information in arrays of atoms at rapid speed. "These types of flying atoms could enable a new type of dynamic quantum computing by allowing the relative locations of qubits — the quantum equivalent to binary bits — to be more freely changed," said Ahn."It could also be used to create collisions between individual atoms, opening a new field of atom-by-atom chemistry."
France Dernières Nouvelles, France Actualités
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