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@ARTICLE{Funcke:486574,
      author       = {Funcke, Lena and Jansen, Karl and Kühn, Stefan},
      title        = {{CP}-violating {D}ashen phase transition in the two-flavor
                      {S}chwinger model: a study with matrix product states},
      reportid     = {PUBDB-2022-07360, arXiv:2110.15642. MIT-CTP/5348},
      year         = {2022},
      note         = {9 pages, 3 figures, proceedings of the 38th International
                      Symposium on Lattice Field Theory, 26th-30th July 2021,
                      Zoom/Gather@Massachusetts Institute of Technology, version
                      2: updated funding information},
      abstract     = {We numerically study the Hamiltonian lattice formulation of
                      the two-flavor Schwinger model using matrix product states.
                      Keeping the mass of the first flavor at a fixed positive
                      value, we tune the mass of the second flavor through a range
                      of negative values, thus exploring a regime where
                      conventional Monte Carlo methods suffer from the sign
                      problem and may run into instabilities due to zero modes.
                      Our results indicate a phase transition at the point where
                      the absolute value of the second flavor mass approaches the
                      first flavor mass. The phase transition is accompanied by
                      the formation of a fermion condensate, a steep drop of the
                      average electric field, and a peak in the bipartite
                      entanglement entropy. Our data hints at a second order
                      transition, which is the 1+1D analog of the CP-violating
                      Dashen phase transition in QCD.},
      keywords     = {CP: violation (INSPIRE) / fermion: condensation (INSPIRE) /
                      entropy: entanglement (INSPIRE) / critical phenomena
                      (INSPIRE) / flavor (INSPIRE) / Schwinger model (INSPIRE) /
                      quantum chromodynamics (INSPIRE) / zero mode (INSPIRE) /
                      Hamiltonian (INSPIRE) / stability (INSPIRE) / lattice
                      (INSPIRE) / electric field (INSPIRE) / formation (INSPIRE) /
                      Monte Carlo (INSPIRE)},
      cin          = {$Z_ZPPT$ / $Z_TH$},
      cid          = {$I:(DE-H253)Z_ZPPT-20210408$ / $I:(DE-H253)Z_TH-20210408$},
      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       = {2110.15642},
      howpublished = {arXiv:2110.15642},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2110.15642;\%\%$},
      doi          = {10.3204/PUBDB-2022-07360},
      url          = {https://bib-pubdb1.desy.de/record/486574},
}