Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session J17: Focus Silicon Spin Qubits in Double Quantum Dots
2:30 PM–5:18 PM,
Tuesday, March 3, 2020
Room: 203
Sponsoring
Unit:
DQI
Chair: Susan Clark, Sandia National Laboratories
Abstract: J17.00007 : Universal quantum logic in hot silicon qubits
View Presentation
Abstract
Presenter:
Harmen Eenink
(Delft University of Technology)
Authors:
Harmen Eenink
(Delft University of Technology)
Luca Petit
(Delft University of Technology)
Maximilian Russ
(Delft University of Technology)
William I.L. Lawrie
(Delft University of Technology)
Nico Hendrickx
(Delft University of Technology)
Jim Clarke
(Components Research, Intel Corporation)
Lieven M Vandersypen
(Delft University of Technology)
Menno Veldhorst
(Delft University of Technology)
Here, we study quantum operations in a silicon two-qubit system, operated at a temperature of 1.1 K. We perform readout using Pauli spin blockade and obtain coherent single-qubit control via electron-spin-resonance, with fidelities exceeding 99 %. We show tunability of the exchange interaction between the two spins from 0.5 up to 18 MHz and use this mechanism to execute coherent two-qubit controlled rotations (CROT). We additionally investigate the temperature dependence of the coherence times, which we find surprisingly robust against thermal noise.
Our results mark an important step for the realization of quantum integrated circuits, a scalable approach towards practical quantum computation.
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