Shuttling a single charge across a one-dimensional array of silicon quantum dots.

Abstract:

:Significant advances have been made towards fault-tolerant operation of silicon spin qubits, with single qubit fidelities exceeding 99.9%, several demonstrations of two-qubit gates based on exchange coupling, and the achievement of coherent single spin-photon coupling. Coupling arbitrary pairs of spatially separated qubits in a quantum register poses a significant challenge as most qubit systems are constrained to two dimensions with nearest neighbor connectivity. For spins in silicon, new methods for quantum state transfer should be developed to achieve connectivity beyond nearest-neighbor exchange. Here we demonstrate shuttling of a single electron across a linear array of nine series-coupled silicon quantum dots in ~50 ns via a series of pairwise interdot charge transfers. By constructing more complex pulse sequences we perform parallel shuttling of two and three electrons at a time through the array. These experiments demonstrate a scalable approach to physically transporting single electrons across large silicon quantum dot arrays.

journal_name

Nat Commun

journal_title

Nature communications

authors

Mills AR,Zajac DM,Gullans MJ,Schupp FJ,Hazard TM,Petta JR

doi

10.1038/s41467-019-08970-z

subject

Has Abstract

pub_date

2019-03-05 00:00:00

pages

1063

issue

1

issn

2041-1723

pii

10.1038/s41467-019-08970-z

journal_volume

10

pub_type

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