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A Novel Class of Phase Space Representations for the Exact Population Dynamics of Two-State Quantum Systems and the Relation to Triangle Window Functions
Cheng, Xiangsong ; He, Xin ; Liu, Jian
arXiv.org, 2024-05
Ithaca: Cornell University Library, arXiv.org
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Título:
A Novel Class of Phase Space Representations for the Exact Population Dynamics of Two-State Quantum Systems and the Relation to Triangle Window Functions
Autor:
Cheng, Xiangsong
;
He, Xin
;
Liu, Jian
Assuntos:
Dynamics
;
Equations of motion
;
Isomorphism
;
Mathematics - Mathematical Physics
;
Physics - Chemical Physics
;
Physics - Computational Physics
;
Physics - Mathematical Physics
;
Physics - Quantum Physics
;
Physics - Statistical Mechanics
;
Quantum theory
;
Representations
;
Time dependence
;
Weighting functions
;
Window functions
É parte de:
arXiv.org, 2024-05
Descrição:
Isomorphism of the two-state system is heuristic in understanding the dynamical or statistical behavior of the simplest yet most quantum system that has no classical counterpart. We use the constraint phase space developed in J. Chem. Phys. 2016, 145, 204105; 2019, 151, 024105 and J. Phys. Chem. Lett. 2021, 12, 2496-2501, non-covariant phase space functions, time-dependent weight functions, and time-dependent normalization factors to construct a novel class of phase space representations of the exact population dynamics of the two-state quantum system. The equations of motion of the trajectory on constraint phase space are isomorphic to the time-dependent Schr\"odinger equation. The contribution of each trajectory to the integral expression for the population dynamics is always positive semi-definite. We also prove that the triangle window function approach, albeit proposed as a heuristic empirical model in J. Chem. Phys. 2016, 145, 144108, is related to a special case of the novel class and leads to an isomorphic representation of the exact population dynamics of the two-state quantum system.
Editor:
Ithaca: Cornell University Library, arXiv.org
Idioma:
Inglês
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