Entanglement generation via power-of-swap operations between dynamic electron-spin qubits
Name
PhysRevA.101.022329.pdf
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1.36 MB
Format
Adobe PDF
Checksum (MD5)
135665e4e300487235c7150d258211c1
Author(s)
Arvidsson Shukur, David Roland
Date Issued
February 24, 2020
Journal
Physical review A
Publisher
American Physical Society
Citation
Lepage, Hugo V., Aleksander A. Lasek, David R. M. Arvidsson-Shukur, and Crispin H. W. Barnes, "Entanglement generation via power-of-swap operations between dynamic electron-spin qubits." Physical review A 101, 2 (February 2020): no. 022329 ©2020 Author(s)
Version
Final published version
Abstract
Surface acoustic waves (SAWs) can create moving quantum dots in piezoelectric materials. Here we show how electron-spin qubits located on dynamic quantum dots can be entangled. Previous theoretical and numerical models of quantum-dot entanglement generation have been insufficient to study quantum dynamics in realistic experimental devices. We utilize state-of-the-art graphics processing units to simulate the wave-function dynamics of two electrons carried by a SAW through a two-dimensional semiconductor heterostructure. We build a methodology to implement a power-of-swap gate via the Coulomb interaction. A benefit of the SAW architecture is that it provides a coherent way of transporting the qubits through an electrostatic potential. This architecture allows us to avoid problems associated with fast control pulses and guarantees operation consistency, providing an advantage over static qubits. For interdot barrier heights where the double occupation energy is sufficiently greater than the double-dot hopping energy, we find that parameters based on experiments in GaAs/AlGaAs heterostructures can produce a high-fidelity root-of-swap operation. Our results provide a methodology for a crucial component of dynamic-qubit quantum computing. ©2020
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.101.022329
