Collisional Narrowing and Dynamical Decoupling in a Dense Ensemble of Cold Atoms

Nonfiction, Science & Nature, Science, Biological Sciences, Molecular Physics, Computers, Advanced Computing, Information Technology
Cover of the book Collisional Narrowing and Dynamical Decoupling in a Dense Ensemble of Cold Atoms by Yoav Sagi, Springer Berlin Heidelberg
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Author: Yoav Sagi ISBN: 9783642296055
Publisher: Springer Berlin Heidelberg Publication: May 23, 2012
Imprint: Springer Language: English
Author: Yoav Sagi
ISBN: 9783642296055
Publisher: Springer Berlin Heidelberg
Publication: May 23, 2012
Imprint: Springer
Language: English

Ultra-cold atomic ensembles have emerged in recent years as a powerful tool in many-body physics research, quantum information science and metrology. This thesis presents an experimental and theoretical study of the coherent properties of trapped atomic ensembles at high densities, which are essential to many of the aforementioned applications. The study focuses on how inter-particle interactions modify the ensemble coherence dynamics, and whether it is possible to extend the coherence time by means of external control. The thesis presents a theoretical model which explains the effect of elastic collision of the coherence dynamics and then reports on experiments which test this model successfully in the lab. Furthermore, the work includes the first implementation of dynamical decoupling with ultra-cold atomic ensembles. It is demonstrated experimentally that by using dynamical decoupling the coherence time can be extended 20-fold. This has a great potential to increase the usefulness of these ensembles for quantum computation.

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Ultra-cold atomic ensembles have emerged in recent years as a powerful tool in many-body physics research, quantum information science and metrology. This thesis presents an experimental and theoretical study of the coherent properties of trapped atomic ensembles at high densities, which are essential to many of the aforementioned applications. The study focuses on how inter-particle interactions modify the ensemble coherence dynamics, and whether it is possible to extend the coherence time by means of external control. The thesis presents a theoretical model which explains the effect of elastic collision of the coherence dynamics and then reports on experiments which test this model successfully in the lab. Furthermore, the work includes the first implementation of dynamical decoupling with ultra-cold atomic ensembles. It is demonstrated experimentally that by using dynamical decoupling the coherence time can be extended 20-fold. This has a great potential to increase the usefulness of these ensembles for quantum computation.

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