% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Zhang:474798,
      author       = {Zhang, Jinglei and Ferguson, Ryan and Kühn, Stefan and
                      Haase, Jan F. and Wilson, C. M. and Jansen, Karl and
                      Muschik, Christine A.},
      title        = {{S}imulating gauge theories with variational quantum
                      eigensolvers in superconducting microwave cavities},
      reportid     = {PUBDB-2022-01005, arXiv:2108.08248},
      year         = {2022},
      note         = {22 pages, 9 figures},
      abstract     = {Quantum-enhanced computing methods are promising candidates
                      to solve currently intractable problems. We consider here a
                      variational quantum eigensolver (VQE), that delegates costly
                      state preparations and measurements to quantum hardware,
                      while classical optimization techniques guide the quantum
                      hardware to create a desired target state. In this work, we
                      propose a bosonic VQE using superconducting microwave
                      cavities, overcoming the typical restriction of a small
                      Hilbert space when the VQE is qubit based. The considered
                      platform allows for strong nonlinearities between photon
                      modes, which are highly customisable and can be tuned in
                      situ, i.e. during running experiments. Our proposal hence
                      allows for the realization of a wide range of bosonic ansatz
                      states, and is therefore especially useful when simulating
                      models involving degrees of freedom that cannot be simply
                      mapped to qubits, such as gauge theories, that include
                      components which require infinite-dimensional Hilbert
                      spaces. We thus propose to experimentally apply this bosonic
                      VQE to the U(1) Higgs model including a topological term,
                      which in general introduces a sign problem in the model,
                      making it intractable with conventional Monte Carlo
                      methods.},
      keywords     = {cavity: microwaves (INSPIRE) / superconductivity (INSPIRE)
                      / hardware (INSPIRE) / Hilbert space (INSPIRE) / gauge field
                      theory (INSPIRE) / qubit (INSPIRE) / variational (INSPIRE) /
                      Monte Carlo (INSPIRE) / photon (INSPIRE) / topological
                      (INSPIRE) / U(1) (INSPIRE) / Higgs model (INSPIRE)},
      cin          = {$Z_ZPPT$ / ZEU-THEO},
      cid          = {$I:(DE-H253)Z_ZPPT-20210408$ /
                      I:(DE-H253)ZEU-THEO-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2108.08248},
      howpublished = {arXiv:2108.08248},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2108.08248;\%\%$},
      doi          = {10.3204/PUBDB-2022-01005},
      url          = {https://bib-pubdb1.desy.de/record/474798},
}