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000486574 0247_ $$2arXiv$$aarXiv:2110.15642
000486574 0247_ $$2datacite_doi$$a10.3204/PUBDB-2022-07360
000486574 037__ $$aPUBDB-2022-07360
000486574 041__ $$aEnglish
000486574 088__ $$2arXiv$$aarXiv:2110.15642
000486574 088__ $$2Other$$aMIT-CTP/5348
000486574 1001_ $$0L.Funcke.1$$aFuncke, Lena$$b0
000486574 245__ $$aCP-violating Dashen phase transition in the two-flavor Schwinger model: a study with matrix product states
000486574 260__ $$c2022
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000486574 500__ $$a9 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
000486574 520__ $$aWe numerically study the Hamiltonian lattice formulation of the two-flavor Schwinger model using matrix product states. Keeping the mass of the first flavor at a fixed positive value, we tune the mass of the second flavor through a range of negative values, thus exploring a regime where conventional Monte Carlo methods suffer from the sign problem and may run into instabilities due to zero modes. Our results indicate a phase transition at the point where the absolute value of the second flavor mass approaches the first flavor mass. The phase transition is accompanied by the formation of a fermion condensate, a steep drop of the average electric field, and a peak in the bipartite entanglement entropy. Our data hints at a second order transition, which is the 1+1D analog of the CP-violating Dashen phase transition in QCD.
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000486574 650_7 $$2INSPIRE$$aCP: violation
000486574 650_7 $$2INSPIRE$$afermion: condensation
000486574 650_7 $$2INSPIRE$$aentropy: entanglement
000486574 650_7 $$2INSPIRE$$acritical phenomena
000486574 650_7 $$2INSPIRE$$aflavor
000486574 650_7 $$2INSPIRE$$aSchwinger model
000486574 650_7 $$2INSPIRE$$aquantum chromodynamics
000486574 650_7 $$2INSPIRE$$azero mode
000486574 650_7 $$2INSPIRE$$aHamiltonian
000486574 650_7 $$2INSPIRE$$astability
000486574 650_7 $$2INSPIRE$$alattice
000486574 650_7 $$2INSPIRE$$aelectric field
000486574 650_7 $$2INSPIRE$$aformation
000486574 650_7 $$2INSPIRE$$aMonte Carlo
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000486574 7001_ $$0P:(DE-H253)PIP1003636$$aJansen, Karl$$b1
000486574 7001_ $$0P:(DE-HGF)0$$aKühn, Stefan$$b2$$eCorresponding author
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000486574 9141_ $$y2022
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