In this paper we study adiabatic information transport along a chain of quantum dots. Adiabatic operations as well as transportation have inherently the advantage of being relatively robust to errors in the control parameters. Since experimentalist have a hard time controling tiny quantum particles precisely, this property is extremely important. The qubit (quantum bit) is transported via time-dependant tunneling between adjacent quantum dots.

There is however a second source of errors which is due to the environment of the quantum particle. Here we model two different environmentally induced errors and study under which circumstances the adiabatic transport yields a high fidelity.

One error source is non-local dephasing as it typically happens in the presence of a measurement apparatus for readout of quantum information. A second source of decoherence is the local coupling to two-level systems, which might model nearby two-level fluctuators in a solid state system. This type of decoherence exhibits memory and is therefore non-Markovian.

The paper can be found here.