@article{9627,
  abstract     = {We compute the deficiency spaces of operators of the form 𝐻𝐴⊗̂ 𝐼+𝐼⊗̂ 𝐻𝐵, for symmetric 𝐻𝐴 and self-adjoint 𝐻𝐵. This enables us to construct self-adjoint extensions (if they exist) by means of von Neumann's theory. The structure of the deficiency spaces for this case was asserted already in Ibort et al. [Boundary dynamics driven entanglement, J. Phys. A: Math. Theor. 47(38) (2014) 385301], but only proven under the restriction of 𝐻𝐵 having discrete, non-degenerate spectrum.},
  author       = {Lenz, Daniel and Weinmann, Timon and Wirth, Melchior},
  issn         = {1464-3839},
  journal      = {Proceedings of the Edinburgh Mathematical Society},
  number       = {3},
  pages        = {443--447},
  publisher    = {Cambridge University Press},
  title        = {{Self-adjoint extensions of bipartite Hamiltonians}},
  doi          = {10.1017/S0013091521000080},
  volume       = {64},
  year         = {2021},
}