Spins of nitrogen-vacancy (NV) centers in diamond (center photoâ€” bright spots, denoted as orange arrow on left figure) interact with a bath of environmental spins (green arrows). The environmental spins interact with the N-V spins, and destroy their fragile quantum state. By applying a specially designed sequence with more and more pulses, the lifetime of the quantum spin state can be significantly extended right figure).
- G. de Lange, Z. H. Wang, D. Riste, V. V. Dobrovitski, R. Hanson. Universal Dynamical Decoupling of a Single Solid-State Spin from a Spin Bath. Science, 2010; DOI:10.1126/science.1192739