2007/05/02 by J. Beugnon, C. Tuchendler, H. Marion +8 · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1038/nphys698
published as Nature Physics, vol. 3, p. 696 (2007) · 4 pages, 4 figures
arxiv created 2007/05/02 · arxiv updated 2010/06/09
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.