Few-qubit quantum-classical simulation of strongly correlated lattice fermions

Juha M Kreula, Laura García-Álvarez, Lucas Lamata, Stephen R Clark, Enrique Solano, Dieter Jaksch

Research output: Contribution to journalArticle (Academic Journal)peer-review

36 Citations (Scopus)
291 Downloads (Pure)


We study a proof-of-principle example of the recently proposed hybrid quantum-classical simulation of strongly correlated fermion models in the thermodynamic limit. In a "two-site" dynamical mean-field theory (DMFT) approach we reduce the Hubbard model to an effective impurity model subject to self-consistency conditions. The resulting minimal two-site representation of the non-linear hybrid setup involves four qubits implementing the impurity problem, plus an ancilla qubit on which all measurements are performed. We outline a possible implementation with superconducting circuits feasible with near-future technology.
Original languageEnglish
Pages (from-to)11
JournalEPJ Quantum Technology
Publication statusPublished - 8 Aug 2016

Bibliographical note

20 pages, 10 figures


  • quant-ph
  • cond-mat.mes-hall
  • cond-mat.supr-con


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