Topological view of quantum tunneling coherent destruction

8th International Workshop DICE2016: Spacetime - Matter - Quantum Mechanics

物理学;力学

Bernardini, Alex E.^1 ; Chinaglia, Mariana^1

Departamento de Física, Universidade Federal de São Carlos, PO Box 676, São Carlos, SP

13565-905, Brazil^1

关键词: Asymmetric potential;    Coherent destruction;    Coherent tunneling;    First excited state;    Quantum mechanical;    Quantum superpositions;    Quantum tunneling;    Symmetry-breaking;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/880/1/012038/pdf
DOI  :  10.1088/1742-6596/880/1/012038

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Quantum tunneling of the ground and first excited states in a quantum superposition driven by a novel analytical configuration of a double-well (DW) potential is investigated. Symmetric and asymmetric potentials are considered as to support quantum mechanical zero mode and first excited state analytical solutions. Reporting about a symmetry breaking that supports the quantum conversion of a zero-mode stable vacuum into an unstable tachyonic quantum state, two inequivalent topological scenarios are supposed to drive stable tunneling and coherent tunneling destruction respectively. A complete prospect of the Wigner function dynamics, vector field fluxes and the time dependence of stagnation points is obtained for the analytical potentials that support stable and tachyonic modes.