This talk will describe recent experiments aimed at using electron spin as a holder of a quantum information, for possible use in quantum computing schemes. In the GaAs devices investigated, spin relaxation and dephasing are dominated by hyperfine coupling of a single spin to nuclear spin. Using spin-echo methods, coherence times (T₂) exceeding the single qubit operating time by of order 10,000 are obtained. Many challenges still remain. A scheme for integrating this qubit into a large-scale architecture with fault tolerance will also be discussed.

Last updated on Saturday, 01 April 2006 by Victor Yakovenko