Nanosecond-timescale spin transfer using individual electrons in a quadruple-quantum-dot device

T. A. Baart, N. Jovanovic, C Reichl, W Wegscheider, L. M.K. Vandersypen

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

Abstract

The ability to coherently transport electron-spin states between different sites of gate-defined semiconductor quantum dots is an essential ingredient for a quantum-dot-based quantum computer. Previous shuttles using electrostatic gating were too slow to move an electron within the spin dephasing time across an array. Here, we report a nanosecond-timescale spin transfer of individual electrons across a quadruple-quantum-dot device. Utilizing enhanced relaxation rates at a so-called hot spot, we can upper bound the shuttle time to at most 150 ns. While actual shuttle times are likely shorter, 150 ns is already fast enough to preserve spin coherence in, e.g., silicon based quantum dots. This work therefore realizes an important prerequisite for coherent spin transfer in quantum dot arrays.

Original languageEnglish
Article number043101
JournalApplied Physics Letters
Volume109
Issue number4
DOIs
Publication statusPublished - 2016

Fingerprint

Dive into the research topics of 'Nanosecond-timescale spin transfer using individual electrons in a quadruple-quantum-dot device'. Together they form a unique fingerprint.

Cite this