TY  - EJOUR
AU  - Chai, Yahui
AU  - Jansen, Karl
AU  - Kühn, Stefan
AU  - Schwägerl, Tim
AU  - Stollenwerk, Tobias
TI  - Structure-inspired Ansatz and Warm Start of Variational Quantum Algorithms for Quadratic Unconstrained Binary Optimization Problems
IS  - arXiv:2407.02569
M1  - PUBDB-2024-06093
M1  - arXiv:2407.02569
PY  - 2024
AB  - This paper introduces a structure-inspired ansatz for addressing quadratic unconstrained binary optimization problems with the Variational Quantum Eigensolver. We propose a novel warm start technique that is based on imaginary time evolution, and allows for determining a set of initial parameters prioritizing lower energy states in a resource-efficient way. Using classical simulations, we demonstrate that this warm start method significantly improves the success rate and reduces the number of iterations required for the convergence of Variational Quantum Eigensolver. The numerical results also indicate that the warm start approach effectively mitigates statistical errors arising from a finite number of measurements, and to a certain extent alleviates the effect of barren plateaus.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2024-06093
UR  - https://bib-pubdb1.desy.de/record/615335
ER  -