Qubit control and crosstalk characterization in the Kane quantum computer

Full text: The Kane proposal for implementing a quantum computer on an array of 31P atoms in silicon, requires the placement of closely spaced control gates. This theoretical study investigates gate bias and architectural implications with a view to achieve realistic control of qubits. The control of an individual qubit (donor nuclear or electron spin) may be problematic due to interactions (crosstalk) between the gates and the donors neighbouring the qubit being addressed. We use analytical and TCAD modelling, to determine the nature and extent of crosstalk propagation, methods to eliminate them viz. adaptive correction and consider incorporation in a scalable implementation. Copyright (2005) Australian Institute of Physics