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SYQD: Symposium Real-Time Measurements of Quantum Dynamics

SYQD 1: Real-Time Measurements of Quantum Dynamics

SYQD 1.2: Hauptvortrag

Donnerstag, 30. März 2023, 10:00–10:30, HSZ 01

Quantum Dot arrays for Quantum Information Transfer — •Gloria Platero, David Fernandez-Fernandez, and Juan Zurita — Instituto de Ciencia de Materiales de Madrid (CSIC),Spain

The fabrication and control of semiconductor quantum dot arrays open the possibility to use these systems as quantum links, for transferring quantum information between distant sites, an indispensable part of large-scale quantum information processing. In this talk I will discuss different pulse-based protocols to transfer spin holes between edges of a quantum dot chain with high fidelity. I will show how the spin polarization of the transferred holes can be controlled by tuning the ratio between the SOC and the spin conserving tunneling rate [1]. Also, I will discuss how to transfer entangled hole spin qubits between edge dots. Our theoretical results suggest the feasibility of quantum dot arrays as high-fidelity quantum buses to distribute information between distant sites and perform one qubit gates in parallel.

An alternative way to transfer information between distant sites is mediated by protected topological edge states. I will discuss the long-range particle dynamics mediated by edge states in different quantum dot array configurations [2], which opens a new avenue for quantum state transfer protocols in low dimensional topological lattices.

[1] D. Fernández-Fernández et al., Phys. Rev. App., in press;D. Fernández-Fernández et al., submitted. [2] J. Zurita, C. E. Creffield, G. Platero, Quantum, 5, 591 (2021); ibid, submitted.