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Time minimal trajectories for two-level quantum systems with two bounded controls

Abstract : In this paper we consider the minimum time population transfer problem for a two level quantum system driven by two external fields with bounded amplitude. The controls are modeled as real functions and we do not use the Rotating Wave Approximation. After projection on the Bloch sphere, we tackle the time-optimal control problem with techniques of optimal synthesis on 2-D manifolds. Based on the Pontryagin Maximum Principle, we characterize a restricted set of candidate optimal trajectories. Properties on this set, crucial for complete optimal synthesis, are illustrated by numerical simulations. Furthermore, when the two controls have the same bound and this bound is small with respect to the difference of the two energy levels, we get a complete optimal synthesis up to a small neighborhood of the antipodal point of the starting point.
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https://hal.inria.fr/hal-00748051
Contributor : Ruixing Long Connect in order to contact the contributor
Submitted on : Saturday, November 3, 2012 - 8:38:32 PM
Last modification on : Friday, January 1, 2021 - 4:02:05 PM
Long-term archiving on: : Saturday, December 17, 2016 - 7:10:20 AM

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  • HAL Id : hal-00748051, version 1
  • ARXIV : 1211.0666

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Ugo Boscain, Fredrik Grönberg, Ruixing Long, Herschel Rabitz. Time minimal trajectories for two-level quantum systems with two bounded controls. 2012. ⟨hal-00748051⟩

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