English

Pseudo supersymmetric partners for the generalized Swanson model

Quantum Physics 2009-11-13 v1 Mathematical Physics math.MP

Abstract

New non Hermitian Hamiltonians are generated, as isospectral partners of the generalized Swanson model, viz., H=AA+αA2+βA2 H_- = {\cal{A}}^{\dagger} {\cal{A}} + \alpha {\cal{A}} ^2 + \beta {\cal{A}}^{\dagger 2} , where αβ \alpha \beta are real constants, with αβ \alpha \neq \beta , and A{\cal{A}}^{\dagger} and A{\cal{A}} are generalized creation and annihilation operators. It is shown that the initial Hamiltonian HH_-, and its partner H+H_+, are related by pseudo supersymmetry, and they share all the eigen energies except for the ground state. This pseudo supersymmetric extension enlarges the class of non Hermitian Hamiltonians H±H_{\pm}, related to their respective Hermitian counterparts h±h_{\pm}, through the same similarity transformation operator ρ\rho : H±=ρ1h±ρ H_{\pm} = \rho ^{-1} h_{\pm} \rho . The formalism is applied to the entire class of shape-invariant models.

Keywords

Cite

@article{arxiv.0806.4490,
  title  = {Pseudo supersymmetric partners for the generalized Swanson model},
  author = {A. Sinha and P. Roy},
  journal= {arXiv preprint arXiv:0806.4490},
  year   = {2009}
}

Comments

22 pages, to be published in J. Phys. A

R2 v1 2026-06-21T10:54:59.676Z