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

2007; Nature Portfolio; Volume: 3; Issue: 10 Linguagem: Inglês

10.1038/nphys698

1745-2481

J. Beugnon, Charles Tuchendler, H. Marion, Alpha Gaétan, Y. Miroshnychenko, Yvan R. P. Sortais, Andrew M. Lance, M. P. A. Jones, Gaétan Messin, Antoine Browaeys, Philippe Grangier,

Quantum optics and atomic interactions

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 independant qubits, arranged in three spatial regions where (i) the initialized qubits are stored in a register, (ii) two qubits are brought together to realize a gate, and (iii) the readout of the qubits is performed. 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 sub-micron 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.