Optimal Control of One-Qubit Gates
K. M. Fonseca-Romero, G. Useche-Laverde, F. Torres-Ardila
Abstract
We consider the problem of carrying an initial Bloch vector to a final Bloch vector in a specified amount of time under the action of three control fields (a vector control field). We show that this control problem is solvable and therefore it is possible to optimize the control. We choose the physically motivated criteria of minimum energy spent in the control, minimum magnitude of the rate of change of the control and a combination of both. We find exact analytical solutions.
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