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arXiv:2608.21329

Quantum annealing through a first-order phase transition: field theory approach

Diego Andrés Rivera Orona, Predrag Punoševac, Nikolai A. Sinitsyn

quant-phcond-mat.otherSubmitted Aug 21, 2026• Announced Aug 24, 2026• 0 citations
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Abstract

Unlike second-order phase transitions, a first-order transition has a stage, in which a system is trapped in a metastable state. The decay of this state leads to abundant excitations over the ground state. We present a field theory for kinetics of defects emerging during quantum annealing computations. This theory predicts several power laws for the error generation rate during quantum annealing either though or near the first-order phase transition. Sharp changes between the power exponents are predicted for continuous parameter changes. Observation of this behavior would be a signature of first-order critical points and could help identify and avoid them for better computations. The driven Lipkin-Meshkov-Glick model (LMGm) serves as the minimal model of interacting Ising spins that demonstrates this behavior.

Comments
10 pages, 3 figures

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