Initializing a quantum register from Mott-insulator states in optical lattices

We propose and quantitatively develop two schemes to quickly and accurately generate a stable initial configuration of neutral atoms in optical microtraps by extraction from the Mott-insulator state in optical lattices. We show that thousands of atoms may be extracted and stored in the ground states of optical microtrap arrays with one atom per trap in one operational process demonstrating massive scalability. The failure probability during extraction in the first scheme can be made sufficiently small (∼ 10-4) to initialize a large-scale quantum register with high fidelity. A complementary faster scheme with more extracted atoms but lower fidelity is also developed.