Photon Storage in Lambda-type Optically Dense Atomic Media. IV. Optimal Control Using Gradient Ascent

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Photon Storage in Lambda-type Optically Dense Atomic Media. IV. Optimal Control Using Gradient Ascent

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Title: Photon Storage in Lambda-type Optically Dense Atomic Media. IV. Optimal Control Using Gradient Ascent
Author: Sorensen, Anders; Gorshkov, Alexey Vyacheslavovich; Calarco, Tommaso; Lukin, Mikhail D.

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Citation: Gorshkov, Alexey V., Tommaso Calarco, Mikhail D. Lukin, and Anders Sorensen. 2008. Photon storage in Lambda-type optically dense atomic media. IV. optimal control using gradient ascent. Physical Review A 77(4): 043806.
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Abstract: We use the numerical gradient ascent method from optimal control theory to extend efficient photon storage in Lambda-type media to previously inaccessible regimes and to provide simple intuitive explanations for our optimization techniques. In particular, by using gradient ascent to shape classical control pulses used to mediate photon storage, we open up the possibility of high efficiency photon storage in the non-adiabatic limit, in which analytical solutions to the equations of motion do not exist. This control shaping technique enables an order-of-magnitude increase in the bandwidth of the memory. We also demonstrate that the often discussed connection between time reversal and optimality in photon storage follows naturally from gradient ascent. Finally, we discuss the optimization of controlled reversible inhomogeneous broadening.
Published Version: doi:10.1103/PhysRevA.77.043806
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5385404

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  • FAS Scholarly Articles [7374]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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