We propose a scalable neutral atom quantum computer with an on-demand interaction. Artificial lattice of near field optical traps is employed to trap atom qubits. Interactions between atoms can be turned off if the atoms are separated by a high enough potential barrier so that the size of the atomic wave function is much less than the interatomic distance. One-qubit gate operation is implemented by a gate control laser beam which is attached to an individual atom. Two-qubit gate operation between a particular pair of atoms is introduced by leaving these atoms in an optical lattice and making them collide so that a particular two-qubit state acquires a dynamical phase. Our proposal is feasible within existing technology developed in cold atom gas, MEMS, nanolithography, and various areas in optics.
@article{arxiv.1009.4426,
title = {Scalable Neutral Atom Quantum Computer with Interaction on Demand},
author = {Mikio Nakahara and Tetsuo Ohmi and Yasushi Kondo},
journal= {arXiv preprint arXiv:1009.4426},
year = {2010}
}
Comments
8 pages, 6 figures, v2 typos corrected, comment on MEMS is added in Section V