Two-dimensional transport and transfer of a single atomic qubit in optical tweezers

Quantum computers have the capability of out-performing their classical counterparts for certain computational problems. Several scalable quantum-computing architectures have been proposed. An attractive architecture is a large set of physically independent qubits arranged in three spatial regions w...

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Veröffentlicht in:Nature physics 2007-10, Vol.3 (10), p.696-699
Hauptverfasser: Browaeys, Antoine, Beugnon, Jérôme, Tuchendler, Charles, Marion, Harold, Gaëtan, Alpha, Miroshnychenko, Yevhen, Sortais, Yvan R. P, Lance, Andrew M, Jones, Matthew P. A, Messin, Gaétan, Grangier, Philippe
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Sprache:eng
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Zusammenfassung:Quantum computers have the capability of out-performing their classical counterparts for certain computational problems. Several scalable quantum-computing architectures have been proposed. An attractive architecture is a large set of physically independent qubits arranged in three spatial regions where (1) the initialized qubits are stored in a register, (2) two qubits are brought together to realize a gate and (3) the readout of the qubits is carried out. For a neutral-atom-based architecture, a natural way to connect these regions is to use optical tweezers to move qubits within the system. In this letter we demonstrate the coherent transport of a qubit, encoded on an atom trapped in a submicrometre tweezer, over a distance typical of the separation between atoms in an array of optical traps. Furthermore, we transfer a qubit between two tweezers, and show that this manipulation also preserves the coherence of the qubit.
ISSN:1745-2473
1745-2481
1476-4636
DOI:10.1038/nphys698