Author:
Brif Constantin,Chakrabarti Raj,Rabitz Herschel
Abstract
Quantum control is concerned with active manipulation of physical and chemical
processes on the atomic and molecular scale. This work presents a perspective of
progress in the field of control over quantum phenomena, tracing the evolution of
theoretical concepts and experimental methods from early developments to the most
recent advances. Among numerous theoretical insights and technological improvements
that produced the present state-of-the-art in quantum control, there have been
several breakthroughs of foremost importance. On the technology side, the current
experimental successes would be impossible without the development of intense
femtosecond laser sources and pulse shapers. On the theory side, the two most
critical insights were (i) realizing that ultrafast atomic and molecular dynamics can
be controlled via manipulation of quantum interferences and (ii) understanding that
optimally shaped ultrafast laser pulses are the most effective means for producing
the desired quantum interference patterns in the controlled system. Finally, these
theoretical and experimental advances were brought together by the crucial concept of
adaptive feedback control (AFC), which is a laboratory procedure employing
measurement-driven, closed-loop optimization to identify the best shapes of
femtosecond laser control pulses for steering quantum dynamics towards the desired
objective. Optimization in AFC experiments is guided by a learning algorithm, with
stochastic methods proving to be especially effective. AFC of quantum phenomena has
found numerous applications in many areas of the physical and chemical sciences, and
this paper reviews the extensive experiments. Other subjects discussed include
quantum optimal control theory, quantum control landscapes, the role of theoretical
control designs in experimental realizations and real-time quantum feedback control.
The paper concludes with a perspective of open research directions that are likely to
attract significant attention in the future.
Subject
General Physics and Astronomy
Cited by
756 articles.
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