Adaptive variational quantum simulations, crucial for understanding complex multi-reference static correlation, face a significant hurdle termed "representation-induced symmetry trapping." This limitation impedes the trainability of quantum chemistry algorithms by establishing a profound interdependence between selected quantum representation topologies and the specific molecular geometry under investigation. Researchers systematically unveiled a deep physical reliance on point-group symmetry1, which generates these traps. This finding emerged from evaluations of a spin-conserved SUSD operator pool applied to highly stretched configurations (at 2 x Re) of asymmetric lithium hydride (LiH) molecules. The study indicates that inherent symmetries within molecular structures can effectively 'trap' quantum representations, severely constraining an algorithm's capacity for accurate evolution or training, particularly under strong electron correlation. Recognizing these fundamental symmetry traps is essential for bolstering the reliability and scalability of quantum algorithms, directly influencing the development of robust and predictable quantum computing applications for intricate chemical systems.
Representation-Induced Symmetry Trapping in Adaptive Variational Quantum Simulations of Multi-Reference Topologies
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References
- arXiv Quantum Physics. (2026, June 11). Representation-Induced Symmetry Trapping in Adaptive Variational Quantum Simulations of Multi-Reference Topologies. *arXiv Quantum Physics*. https://arxiv.org/abs/2606.13387v1
Original Source
arXiv Quantum Physics
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