Quantum annealing with antiferromagnetic transverse interactions for the Hopfield model

Yuya Seki, Hidetoshi Nishimori

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


We investigate quantum annealing (QA) with antiferromagnetic transverse interactions for the generalized Hopfield model with k-body interactions. The goal is to study the effectiveness of antiferromagnetic interactions, which were shown to help us avoid problematic first-order quantum phase transitions in pure ferromagnetic systems, in random systems. We estimate the efficiency of QA by analyzing phase diagrams for two cases where the number of embedded patterns is finite or extensively large. The phase diagrams of the model with finite patterns show that there exist annealing paths that avoid first-order transitions at least for . The same is true for the extensive case with k = 4 and 5. In contrast, it is impossible to avoid first-order transitions for the case of finite patterns with k = 3 and the case of extensive number of patterns with k = 2 and 3. The spin-glass phase hampers the QA process in the case of k = 2 and extensive patterns. These results indicate that QA with antiferromagnetic transverse interactions is efficient also for certain random spin systems.

Original languageEnglish
Article number335301
JournalJournal of Physics A: Mathematical and Theoretical
Issue number33
Publication statusPublished - 2015 Aug 21


  • Hopfield model
  • mean-field analysis
  • phase diagram
  • quantum annealing
  • quantum phase transition

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Modelling and Simulation
  • Mathematical Physics
  • Physics and Astronomy(all)


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