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- W1929831048 abstract "In many-electron systems, particularly when it is the case that the system consists of quasi-particles having almost no interaction with each other, the approaches to considering a quasi-particle to be a basic particle are important. We propose a bosonization method of the system in which a quasi-particle consists of electron–hole pairs. Low-lying electron excited states are approximately considered as the collective motion states of the quasi-particles that correspond to the quantized normal mode oscillations, and each of these quasi-particles consists of the electron–hole pairs. We consider the fundamental model Hamiltonian, and transform this into the quasi-particle representation Hamiltonian. Then, we transform these quasi-particles into bosons by using the Dyson-type boson mapping method. The obtained Dyson-type boson Hamiltonian enables a straightforward interpretation of the low-lying electron excited states and facilitates their calculation. To confirm the usefulness of this method, we apply this to the |$pi$|-electrons system of the ethylene molecule." @default.
- W1929831048 created "2016-06-24" @default.
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- W1929831048 date "2015-06-01" @default.
- W1929831048 modified "2023-09-26" @default.
- W1929831048 title "Application of the Dyson-type boson mapping for low-lying electron excited states in molecules" @default.
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- W1929831048 doi "https://doi.org/10.1093/ptep/ptv068" @default.
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