Probing resonating valence bonds on a programmable germanium quantum simulator

Chien An Wang, Corentin Déprez, Hanifa Tidjani, William I.L. Lawrie, Nico W. Hendrickx, Amir Sammak, Giordano Scappucci, Menno Veldhorst*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
24 Downloads (Pure)

Abstract

Simulations using highly tunable quantum systems may enable investigations of condensed matter systems beyond the capabilities of classical computers. Quantum dots and donors in semiconductor technology define a natural approach to implement quantum simulation. Several material platforms have been used to study interacting charge states, while gallium arsenide has also been used to investigate spin evolution. However, decoherence remains a key challenge in simulating coherent quantum dynamics. Here, we introduce quantum simulation using hole spins in germanium quantum dots. We demonstrate extensive and coherent control enabling the tuning of multi-spin states in isolated, paired, and fully coupled quantum dots. We then focus on the simulation of resonating valence bonds and measure the evolution between singlet product states which remains coherent over many periods. Finally, we realize four-spin states with s-wave and d-wave symmetry. These results provide means to perform non-trivial and coherent simulations of correlated electron systems.

Original languageEnglish
Article number58
Number of pages8
JournalNPJ Quantum Information
Volume9
Issue number1
DOIs
Publication statusPublished - 2023

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