An algebraic construction of the coherent states of the Morse potential based on SUSY QM

Details An algebraic construction of the coherent states of the Morse potential based on SUSY QM An algebraic construction of the coherent states of the Morse potential based on SUSY QM

1998-12-16

arxiv.org/abs/quant-ph/9812041v2

Physics

Quantum Physics

7 pages, LATEX, added references, corrected typos

Scientific paper

By introducing the shape invariant Lie algebra spanned by the SUSY ladder operators plus the unity operator, a new basis is presented for the quantum treatment of the one-dimensional Morse potential. In this discrete, complete orthonormal set, which we call the pseudo number states, the Morse Hamiltonian is tridiagonal. By using this basis we construct coherent states algebraically for the Morse potential, in a close analogy with the harmonic oscillator. We also show that there exists an unitary displacement operator creating these coherent states from the ground state. We show that our coherent states form a continuous and overcomplete set of states. They coincide with a class of states constructed earlier by Nieto and Simmons by using the coordinate representation. \pacs{3.65.Fd, 02.20.Sv, 42.50.-p}

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