Quantum annealing with a nonvanishing final value of the transverse field

Kohji Nishimura, Hidetoshi Nishimori

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We study the problem to infer the original ground state of a spin-glass Hamiltonian out of the information from the Hamiltonian with interactions deviated from the original ones. Our motivation comes from quantum annealing on a real device in which the values of interactions are degraded by noise. We show numerically for quasi-one-dimensional systems that the Hamming distance between the original ground state and the inferred spin state is minimized when we stop the process of quantum annealing before the amplitude of the transverse field reaches zero in contrast to the conventional prescription. This result means that finite quantum fluctuations compensate for the effects of noise, at least, to some extent. Analytical calculations using the infinite-range mean-field model support our conclusion qualitatively.

Original languageEnglish
Article number042310
JournalPhysical Review A
Issue number4
Publication statusPublished - 2017 Oct 10

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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