Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session P29: Semiconducting QC Architectures and Quantum Photonics
2:30 PM–5:30 PM,
Wednesday, March 6, 2019
BCEC Room: 162A
Sponsoring Unit: DQI
Chair: Samuel Carter, United States Naval Research Laboratory
Abstract: P29.00003 : Coherent control of individual electron spins in a two-dimensional array of tunnel coupled quantum dots*
2:54 PM–3:30 PM
(CNRS Institut Néel)
(CNRS Institut Néel)
Here we demonstrate such two-dimensional coherent control using individual electron spins in arrays up to 9 tunnel-coupled lateral quantum dots. Two-electron spin initialization, spin readout and spin transfer enable exploration of the spin dynamics in the QDs array. We demonstrate a procedure that permits local enhancement of the tunnel coupling between two dots of the array up to a range where coherent exchange oscillations, the basis of the two-qubit gates for electron spin qubits, are observed. Taking advantage of the tunability of the structure, we finally realize complex and multi-directional displacements of one and two electrons through quantum dot arrays. This work demonstrates key quantum functionalities, crucial for using two-dimensional quantum dot arrays for quantum simulation and computation.
 H. Flentje, P.-A. Mortemousque, R. Thalineau, A. Ludwig, A. D. Wieck, C. Bäuerle, T.
Meunier, Coherent long-distance displacement of individual electron spins, Nat. Comm.
8, 501 (2017).
 P.-A. Mortemousque, H. Flentje, E. Chanrion, A. Ludwig, A. D. Wieck, M. Urdampilleta,
C. Bäuerle, T. Meunier, Coherent control of individual electron spins in a
two-dimensional array of quantum dots, Arxiv : 1809.04584
*A.L. and A.D.W. acknowledge gratefully the support of the BMBF Q.com-H 16KIS0109, Mercur Pr-2013-0001 and the DFH/UFA CDFA-05-06. T.M. acknowledges financial support from ERC "QSPINMOTION".
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