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005     20250715180003.0
024 7 _ |a arXiv:2110.15642
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024 7 _ |a 10.22323/1.396.0552
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088 _ _ |a arXiv:2110.15642
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088 _ _ |a MIT-CTP/5348
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100 1 _ |a Funcke, Lena
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111 2 _ |a 38th International Symposium on Lattice Field Theory,
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|d 2021-07-26 - 2021-07-31
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245 _ _ |a CP-violating Dashen phase transition in the two-flavor Schwinger model: a study with matrix product states
260 _ _ |a Trieste
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300 _ _ |a 552
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500 _ _ |a 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
520 _ _ |a 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.
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650 _ 7 |a CP: violation
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650 _ 7 |a fermion: condensation
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650 _ 7 |a entropy: entanglement
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650 _ 7 |a critical phenomena
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650 _ 7 |a flavor
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650 _ 7 |a Schwinger model
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650 _ 7 |a quantum chromodynamics
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650 _ 7 |a zero mode
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650 _ 7 |a Hamiltonian
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650 _ 7 |a stability
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650 _ 7 |a lattice
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650 _ 7 |a electric field
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650 _ 7 |a formation
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650 _ 7 |a Monte Carlo
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700 1 _ |a Jansen, Karl
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700 1 _ |a Kühn, Stefan
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773 _ _ |a 10.22323/1.396.0552
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787 0 _ |a Funcke, Lena et.al.
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|r arXiv:2110.15642 ; MIT-CTP/5348
|t CP-violating Dashen phase transition in the two-flavor Schwinger model: a study with matrix product states
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