  We describe a method for achieving arbitrary 1-qubit gates and controlled-NOT
gates within the context of the Single Cooper Pair Box (SCB) approach to
quantum computing. Such gates are sufficient to support universal quantum
computation. Quantum gate operations are achieved by applying sequences of
voltages and magnetic fluxes to single qubits or pairs of qubits. Neither the
temporal duration, nor the starting time, of a gate operation is used as a
control parameter. As a result, the quantum gates have a constant and known
duration, and depend upon standard control parameter sequences regardless of
when the gate operation begins. This simplifies the integration of quantum
gates into parallel, synchronous, quantum circuits. In addition, we demonstrate
the ability to fabricate such gates, and large-scale quantum circuits, using
current e-beam lithography technology. These features make the SCB-based scheme
a credible contender for practical quantum computer hardware.
