Beecroft Building, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU
Professor Gloria Platero, Materials Science Institute of Madrid ICMM
Natalia Ares: natalia.ares@eng.ox.ac.uk
Abstract
The recent fabrication and control of semiconductor quantum dot arrays opens the possibility of using these systems as quantum links between distant sites in a quantum processor. Their task is the transfer of quantum information between distant sites, an indispensable part of large-scale quantum information processing [1,2]. Also, the recent implementation of quantum dot arrays has shown their feasibility as quantum simulators of complex lattices [3]. Recently, it has been shown how to imprint non-trivial topology in a quantum dot array by means of Floquet engineering [4].
In this talk, I will review the different protocols to transfer particles and their corresponding quantum states in quantum dot arrays. Then, I will discuss an alternative way to transfer information with high fidelity, by using robust edge states in systems with non-trivial topology [5,6]. I will discuss the long-range particle transfer mediated by edge states in different atomic array configurations and the role of topological domain walls to speed up the transfer.
Finally, a protocol for entanglement generation between distant qubits mediated by a topological lattice, the stub-SSH, will show the feasibility of these systems to transfer information and generate entanglement with high fidelity.
[1] D. Fernández-Fernández et al., Quantum, 8, 1533 (2024)
[2] M. de Smet et al., Nature Nanotech., 20, 866 (2025)
[3] M. Kiczynski et al., Nature, 606, 694 (2022)
[4] B. Pérez-González et al., Phys. Rev. Lett., 123, 126401 (2019)
[5] N. Lang et al., npj Quantum Info., 3,47 (2017)
[6] J. Zurita et al., Quantum, 7, 1043 (2023); J. Zurita et al., Quantum, 9, 1625 (2025