



01341nas a2200145   4500008004100000245004200041210004200083260001300125490000700138520094000145100002801085700002501113700002001138856003701158       2008                        eng d00aOptimal light storage in atomic vapor0 aOptimal light storage in atomic vapor  c2008/8/10 v783 a  We study procedures for the optimization of efficiency of light storage and
retrieval based on the dynamic form of electromagnetically induced transparency
(EIT) in warm Rb vapor. We present a detailed analysis of two recently
demonstrated optimization protocols: a time-reversal-based iteration procedure,
which finds the optimal input signal pulse shape for any given control field,
and a procedure based on the calculation of an optimal control field for any
given signal pulse shape. We verify that the two procedures are consistent with
each other, and that they both independently achieve the maximum memory
efficiency for any given optical depth. We observe good agreement with
theoretical predictions for moderate optical depths (<25), while at higher
optical depths the experimental efficiency falls below the theoretically
predicted values. We identify possible effects responsible for this reduction
in memory efficiency.
1 aPhillips, Nathaniel, B.1 aGorshkov, Alexey, V.1 aNovikova, Irina  uhttp://arxiv.org/abs/0805.3348v100956nas a2200145   4500008004100000245005600041210005600097260001400153490000700167520052600174100002000700700002800720700002500748856003700773       2008                        eng d00aOptimal light storage with full pulse shape control0 aOptimal light storage with full pulse shape control  c2008/8/200 v783 a  We experimentally demonstrate optimal storage and retrieval of light pulses
of arbitrary shape in atomic ensembles. By shaping auxiliary control pulses, we
attain efficiencies approaching the fundamental limit and achieve precise
retrieval into any predetermined temporal profile. Our techniques, demonstrated
in warm Rb vapor, are applicable to a wide range of systems and protocols. As
an example, we present their potential application to the creation of optical
time-bin qubits and to controlled partial retrieval.
1 aNovikova, Irina1 aPhillips, Nathaniel, B.1 aGorshkov, Alexey, V.  uhttp://arxiv.org/abs/0805.1927v1