Quantum fidelity susceptibility in excited state quantum phase transitions: application to the bending spectra of nonrigid molecules

• URL: http://arxiv.org/abs/2102.12335v2
• Date: Fri, 5 Mar 2021 08:47:07 GMT
• Title: Quantum fidelity susceptibility in excited state quantum phase transitions: application to the bending spectra of nonrigid molecules
• Authors: J. Khalouf-Rivera and M. Carvajal and F. P\'erez-Bernal
• Abstract summary: We characterize excited state quantum phase transitions in the two dimensional limit of the vibron model with the quantum fidelity susceptibility. As an application, we perform fits using a four-body algebraic Hamiltonian to bending vibrational data for several molecular species.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We characterize excited state quantum phase transitions in the two dimensional limit of the vibron model with the quantum fidelity susceptibility, comparing the obtained results with the information provided by the participation ratio. As an application, we perform fits using a four-body algebraic Hamiltonian to bending vibrational data for several molecular species and, using the optimized eigenvalues and eigenstates, we locate the eigenstate closest to the barrier to linearity and determine the linear or bent character of the different overtones.

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