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Contrôle Quantique et Protection de la Cohérence par effet Zénon, Applications à l'Informatique Quantique

Abstract : Quantum control is quite an important issue in modern Physics. In particular, in the context of Quantum Computation, controlling the evolution operator enables to implement any quantum gate and thus to perform any computational task on the information stored in the computer. In the first part of this dissertation, after a brief review of the field, a method, called the non-holonomic control, is put forward in order to control the evolution operator. This method is then applied to a realistic physical situation, involving cold atoms of Caesium.
The interaction of the computer with its environment constitutes a threat for reliable quantum information storage and processing. However, the development of quantum error-correcting methods, inspired of their classical counterparts, suggests that this danger may be avoided. In the second part of this study, an information protection scheme is presented, based on the quantum Zeno effect, which is then applied to a Rubidium atom.
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https://tel.archives-ouvertes.fr/tel-00007910
Contributor : Etienne Brion <>
Submitted on : Thursday, June 9, 2005 - 5:55:02 PM
Last modification on : Monday, February 15, 2021 - 10:47:20 AM
Long-term archiving on: : Friday, November 25, 2016 - 9:14:21 AM

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  • HAL Id : tel-00007910, version 2

Citation

Etienne Brion. Contrôle Quantique et Protection de la Cohérence par effet Zénon, Applications à l'Informatique Quantique. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2004. Français. ⟨tel-00007910v2⟩

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