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arXiv 1603.06985quant-phcs.CCcs.DS

A Quantum Version of Schöning's Algorithm Applied to Quantum 2-SAT

Edward Farhi, Shelby Kimmel, Kristan Temme

英文摘要:

We study a quantum algorithm that consists of a simple quantum Markov process, and we analyze its behavior on restricted versions of Quantum 2-SAT. We prove that the algorithm solves this decision problem with high probability for n qubits, L clauses, and promise gap c in time O(n^2 L^2 c^{-2}). If the Hamiltonian is additionally polynomially gapped, our algorithm efficiently produces a state that has high overlap with the satisfying subspace. The Markov process we study is a quantum analogue of Schöning's probabilistic algorithm for k-SAT.

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