The PRODSAT phase of random quantum satisfiability
Abstract
The -QSAT problem is a quantum analog of the famous -SAT constraint satisfaction problem. We must determine the zero energy ground states of a Hamiltonian of qubits consisting of a sum of random -local rank-one projectors. It is known that product states of zero energy exist with high probability if and only if the underlying factor graph has a clause-covering dimer configuration. This means that the threshold of the PRODSAT phase is a purely geometric quantity equal to the dimer covering threshold. We revisit and fully prove this result through a combination of complex analysis and algebraic methods based on Buchberger's algorithm for complex polynomial equations with random coefficients. We also discuss numerical experiments investigating the presence of entanglement in the PRODSAT phase in the sense that product states do not span the whole zero energy ground state space.
Keywords
Cite
@article{arxiv.2404.18447,
title = {The PRODSAT phase of random quantum satisfiability},
author = {Joon Lee and Nicolas Macris and Jean Bernoulli Ravelomanana and Perrine Vantalon},
journal= {arXiv preprint arXiv:2404.18447},
year = {2026}
}