Quantum computing with spin qubits in semiconductor structures

We survey recent work on designing and evaluating quantum computing implementations based on nuclear or bound-electron spins in semiconductor heterostructures at low temperatures and in high magnetic fields. General overview is followed by a summary of results of our theoretical calculations of decoherence time scales and spin-spin interactions. The latter were carried out for systems for which the two-dimensional election gas provides the dominant carrier for spin dynamics via exchange of spin-excitons in the integer quantum Hall regime. (C) 2002 Elsevier Science B.V. All rights reserved.