Quantum ferromagnetic annealing

Sei Suzuki, Hidetoshi Nishimori

Research output: Contribution to journalArticlepeer-review


Quantum annealing by ferromagnetic interaction is investigated for random-field Ising ferromagnets and Ising spin-glasses, using the Bethe-type mean-field annealing scheme. The fact that there are rooms of choice of the type of quantum fluctuations is a prominent feature in quantum annealing which does not exist in classical simulated annealing. Results of mean-field annealing show that quantum annealing by ferromagnetic interaction lowers the energy of the obtained approximate ground state below that by conventional quantum annealing using only transverse field.

Original languageEnglish
Pages (from-to)367-370
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number2
Publication statusPublished - 2007 Dec
Externally publishedYes


  • Ising spin-glass
  • Quantum annealing
  • Random-field Ising model
  • Transverse ferromagnetic interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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