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Probing resonating valence bonds on a programmable germanium quantum simulator.

Authors :
Wang, Chien-An
Déprez, Corentin
Tidjani, Hanifa
Lawrie, William I. L.
Hendrickx, Nico W.
Sammak, Amir
Scappucci, Giordano
Veldhorst, Menno
Source :
NPJ Quantum Information; 6/17/2023, Vol. 9 Issue 1, p1-8, 8p
Publication Year :
2023

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20566387
Volume :
9
Issue :
1
Database :
Complementary Index
Journal :
NPJ Quantum Information
Publication Type :
Academic Journal
Accession number :
164372005
Full Text :
https://doi.org/10.1038/s41534-023-00727-3