Shuttling a single charge across a one-dimensional array of silicon quantum dots
| Autor: | F. J. Schupp, Michael Gullans, D. M. Zajac, Adam Mills, Thomas Hazard, Jason R. Petta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Quantum decoherence Silicon Quantum register Science General Physics and Astronomy chemistry.chemical_element FOS: Physical sciences 02 engineering and technology Electron Article General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) lcsh:Science Spin-½ Quantum computer Physics Quantum Physics Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Charge (physics) General Chemistry 021001 nanoscience & nanotechnology 030104 developmental biology chemistry Qubit lcsh:Q 0210 nano-technology Quantum Physics (quant-ph) |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019) Nature Communications |
| Popis: | 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. As quantum computers grow in complexity the challenge of moving information between physically separated qubits becomes more pressing. Mills et al. demonstrate transfer of single electrons across an array of nine silicon quantum dots three orders of magnitude faster than spin qubit decoherence times. |
| Databáze: | OpenAIRE |
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