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Coherent control of individual electron spins in a two-dimensional quantum dot array.
Pierre-André Mortemousque1,2, Emmanuel Chanrion3, Baptiste Jadot3
1Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, Grenoble, France. pierre-andre.mortemousque@cea.fr.
Nature Nanotechnology
|December 22, 2020
Summary
Researchers demonstrate the 2D coherent control of electron spins in a quantum dot array. This breakthrough enables scalable quantum information processing and quantum simulation using two-dimensional arrays.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Computing
Background:
- Scalable quantum information platforms require coherent manipulation of individual quantum objects in arrays.
- Electron spin control in quantum dot arrays has led to quantum simulators and multielectron spin-coherent manipulations.
- Two-dimensional (2D) scaling with high connectivity in such systems remains a significant challenge.
Purpose of the Study:
- To demonstrate the 2D coherent control of individual electron spins in a 3x3 array of tunnel-coupled quantum dots.
- To establish foundational capabilities for 2D quantum information processing and simulation.
Main Methods:
- Utilized a 3x3 array of tunnel-coupled quantum dots.
- Implemented charge-deterministic loading and displacement of electrons.
- Performed local spin readout and local coherent exchange manipulation between adjacent electron spins.
Main Results:
- Successfully demonstrated 2D coherent control of individual electron spins.
- Achieved charge-deterministic loading and displacement within the array.
- Showcased local spin readout and coherent exchange operations.
Conclusions:
- This work lays essential groundwork for exploiting 2D arrays of electron spins in quantum simulation.
- The demonstrated functionalities are foundational for advancing 2D quantum information processing.
- Paves the way for scalable quantum technologies based on electron spins in quantum dots.
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