Non-isospectral Hamiltonians, intertwining operators and hidden hermiticity

Details Non-isospectral Hamiltonians, intertwining operators and hidden hermiticity Non-isospectral Hamiltonians, intertwining operators and hidden hermiticity

2011-10-21

arxiv.org/abs/1110.4828v1

Physics

Mathematical Physics

in press in Phys. Lett. A

Scientific paper

We have recently proposed a strategy to produce, starting from a given hamiltonian $h_1$ and a certain operator $x$ for which $[h_1,xx^\dagger]=0$ and $x^\dagger x$ is invertible, a second hamiltonian $h_2$ with the same eigenvalues as $h_1$ and whose eigenvectors are related to those of $h_1$ by $x^\dagger$. Here we extend this procedure to build up a second hamiltonian, whose eigenvalues are different from those of $h_1$, and whose eigenvectors are still related as before. This new procedure is also extended to crypto-hermitian hamiltonians.

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