Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2012-01-24
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, 14 figures
Scientific paper
We propose path integral description for quantum mechanical systems on compact graphs consisting of N segments of the same length. Provided the bulk Hamiltonian is segment-independent, scale-invariant boundary conditions given by self-adjoint extension of Hamiltonian operator turn out to be in one-to-one correspondence with N \times N matrix-valued weight factors in the path integral side. We show that these weight factors are given by N-dimensional unitary representations of the infinite dihedral group.
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