Spectral computations for birth and death chains
arXiv:1305.0353
Abstract
We consider the spectrum of birth and death chains on a -path. An iterative scheme is proposed to compute any eigenvalue with exponential convergence rate independent of . This allows one to determine the whole spectrum in order elementary operations. Using the same idea, we also provide a lower bound on the spectral gap, which is of the correct order on some classes of examples.