Adiabatic passage through space: Robust coherent transport in solid-state systems - Andy Greentree

Stimulated Raman Passage (STIRAP) is a technique for transferring population between atomic energy levels in a three-state system. Hallmarks of this technique are its robustness, the surprising mechanism for population transfer where the enabling pulses are applied in the counter-intuitive direction, and that population is never found in the intermediate state. Exploiting quantum coherence in solid-state systems allows us to consider performing a STIRAP like protocol on a spatially defined triple-dot arrangment. We call this CTAP (Coherent Tunneling Adiabatic Passage). Like STIRAP, this protocol is robust, and population is transferred from the left to the right dot, without ever populating the central dot (even transiently). This procedure can be extended to consider transport through long chains, and to multiple recipients for distributed entanglement generation, and operator measurement QC. We have also formulated a new quasi-2D architecture incorporating based on CTAP.