Interior-boundary conditions for many-body Dirac operators and codimension-1 boundaries

@article{Schmidt2019InteriorboundaryCF,
  title={Interior-boundary conditions for many-body Dirac operators and codimension-1 boundaries},
  author={Julian Schmidt and Stefan Teufel and Roderich Tumulka},
  journal={Journal of Physics A: Mathematical and Theoretical},
  year={2019}
}
We are dealing with boundary conditions for Dirac-type operators, i.e., first order differential operators with matrix-valued coefficients, including in particular physical many-body Dirac operators. We characterize (what we conjecture is) the general form of reflecting boundary conditions (which includes known boundary conditions such as the one of the MIT bag model) and, as our main goal, of interior-boundary conditions (IBCs). IBCs are a new approach to defining UV-regular Hamiltonians for… 
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