Implementing Quantum Gates by Optimal Control with Doubly Exponential Convergence

Details Implementing Quantum Gates by Optimal Control with Doubly Exponential Convergence Implementing Quantum Gates by Optimal Control with Doubly Exponential Convergence

2012-02-12

arxiv.org/abs/1202.2530v1

Physics

Quantum Physics

4+2 figures; to appear in PRL

Scientific paper

We introduce a novel algorithm for the task of coherently controlling a quantum mechanical system to implement any chosen unitary dynamics. It performs faster than existing state of the art methods by one to three orders of magnitude (depending on which one we compare to), particularly for quantum information processing purposes. This substantially enhances the ability to both study the control capabilities of physical systems within their coherence times, and constrain solutions for control tasks to lie within experimentally feasible regions. Natural extensions of the algorithm are also discussed.

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