Thomas Blasi, Harvard
Abstract
The quest for solid-state quantum computing in low-dimensional
semiconductor materials has led to substantial breakthroughs in the
initialization processing and readout of single- and two-particle
states in coupled quantum dots. I will show how quantum optimal
control can be used in this context to find optimized methods to
coherently manipulate electron dynamics, and how both operation times
and fidelity rates can be improved from conventional approaches. In
particular, coupling one and two-electron double quantum dots to
time-dependent fields gives the ability to coherently control electron
states almost arbitrarily. This opens up several perspectives in
solid-state quantum information and quantum electronics. The optimized
external fields can be produced by various means such as optical
sources, gate electrodes or local probes and can be subjected to
physically sensible constraints that are in reach of present
experimental capabilities.