Staying adiabatic with unknown energy gap

Details Staying adiabatic with unknown energy gap Staying adiabatic with unknown energy gap

2011-05-09

arxiv.org/abs/1105.1707v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

We introduce an algorithm to perform an optimal adiabatic evolution that operates without an apriori knowledge of the system spectrum. By probing the system gap locally, the algorithm maximizes the evolution speed, thus minimizing the total evolution time. We test the algorithm on the Landau-Zener transition and then apply it on the quantum adiabatic computation of 3-SAT: The result is compatible with an exponential speed-up for up to twenty qubits with respect to classical algorithms. We finally study a possible algorithm improvement by combining it with the quantum Zeno effect.

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