We demonstrate the coherent transport of two-dimensional (2D) arrays of small ensembles of neutral atoms in a shift register architecture based on 2D arrays of microlenses. We show the scalability of the transport process by presenting the repeated hand-over of atoms from site to site. We prove the conservation of coherence during transport, reloading, and a full shift register cycle. This shows that the fundamental shift sequence can be cascaded and thus scaled to complex and versatile 2D architectures for atom-based quantum information processing, quantum simulation, and the investigation of quantum degenerate gases.
@article{arxiv.0901.1496,
title = {Coherent Transport of Atomic Quantum States in a Scalable Shift Register},
author = {A. Lengwenus and J. Kruse and M. Schlosser and S. Tichelmann and G. Birkl},
journal= {arXiv preprint arXiv:0901.1496},
year = {2011}
}