TY - JOUR
T1 - Photon storage in Lambda-type optically dense atomic media. IV. Optimal control using gradient ascent
JF - Physical Review A
Y1 - 2008
A1 - Alexey V. Gorshkov
A1 - Tommaso Calarco
A1 - Mikhail D. Lukin
A1 - Anders S. Sorensen
AB - 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.
VL - 77
UR - http://arxiv.org/abs/0710.2698v2
CP - 4
J1 - Phys. Rev. A
U5 - 10.1103/PhysRevA.77.043806
ER -