Maximal scarring for eigenfunctions of quantum graphs Academic Article uri icon


  • 2018 IOP Publishing Ltd & London Mathematical Society. We prove the existence of scarred eigenstates for star graphs with scattering matrices at the central vertex which are either a Fourier transform matrix, or a matrix that prohibits back-scattering. We prove the existence of scars that are half-delocalised on a single bond. Moreover we show that the scarred states we construct are maximal in the sense that it is impossible to have quantum eigenfunctions with a significantly lower entropy than our examples. These scarred eigenstates are on graphs that exhibit generic spectral statistics of random matrix type in the large graph limit, and, in contrast to other constructions, correspond to non-degenerate eigenvalues; they exist for almost all choices of lengths.

published proceedings


altmetric score

  • 1.75

author list (cited authors)

  • Berkolaiko, G., & Winn, B.

citation count

  • 0

complete list of authors

  • Berkolaiko, G||Winn, B

publication date

  • January 2018