  Entanglement spectra (ES) for the critical SU(N) (2 <= N <= 4) spin chains
and other integrable models of finite length are studied with the density
matrix renormalization group method. For all models under investigation, the
level spacings and the degeneracy structure of the ES are in excellent
agreement with the spectra of the corner Hamiltonian, defined as the generator
of the associated corner transfer matrix. The correspondence holds between the
ES (n) at the n-th cut position from the edge of the spin model, and the corner
Hamiltonian of length n, for all small values of n. The cut position dependence
of the ES shows a period-N oscillatory behavior for a given SU(N) chain,
reminiscent of the oscillatory part of the entanglement entropy observed in the
past for the same models. Oscillations of the ES do not die out in the bulk of
the chain, in contrast to the asymptotically vanishing oscillation of the
entanglement entropy. Heuristic argument based on Young tableaux consideration
can explain the period-N structure of the ES qualitatively.
