Coherent electronic transfer in quantum dot systems using adiabatic passage

By A. Greentree, J. Cole, A. Hamilton, Lloyd Christopher L. Hollenberg. 2004

224 citations recorded by the source corpus.

We describe a scheme for using an all-electrical, rapid, adiabatic population transfer between two spatially separated dots in a triple-quantum dot system. The electron spends no time in the middle dot and does not change its energy during the transfer process. Although a coherent population transfer method, this scheme may well prove useful in incoherent electronic computation (for example quantum-dot cellular automata) where it may provide a coherent advantage to an otherwise incoherent device. It can also be thought of as a limiting case of type II quantum computing, where sufficient coherence exists for a single gate operation, but not for the preservation of superpositions after the operation. We extend our analysis to the case of many intervening dots and address the issue of transporting quantum information through a multi-dot system.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Computational Theory and Mathematics

View Paper: https://www.semanticscholar.org/paper/a6609a60e00f2e050d94a338f7c4e074924ed5d6

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Citations in the corpus

Light propagation and localization in modulated photonic lattices and waveguides (2011, background): “For example, coherent transport in space of a quantum particle among a chain of quantum wells is an interesting example of quantum tunneling control which has been widely studied in the quantum physics context [55,85,277,56,84,92].”
Coherent control of three-spin states in a triple quantum dot (2011, methodology): “These include the encoding of information to either obtain protection from decoherence or to permit all-electrical operation [5], efficient spin busing across a quantum circuit [6], and to enable quantum error correction utilizing the three-spin GreenbergerHorn-Zeilinger quantum state.”
Roadmap on STIRAP applications (2019, background): “quantum dots [144] for the localised states, and despite the significant theoretical interest that SAP has attracted, no experimental demonstration of the effect for matter waves exists yet.”
Silicon quantum electronics (2012, background): “…to the original Kane version since coherent spin transport is achieved adiabatically, lowering the barriers between donors in a well defined sequence to effect coherent transport by adiabatic passage (CTAP) without populating the intervening donors(Greentree et al., 2004; Rahman et al., 2010).”
Training Schrödinger’s cat: quantum optimal control (2015, background): “The short natural time scales suggest adiabatic schemes to be attractive [49, 126, 152] In view of scaling up control, the design and implementation of unitary maps have recently been demonstrated in a 16dimensional Hilbert space, spanned by the electron and nuclear spins of individual cesium atoms ”
Stimulated Raman adiabatic passage in physics, chemistry, and beyond (2016, methodology): “E); • CTAP: coherent tunneling by adiabatic passage (Sec.”