Coherent structures in quantum systems with two coupled types of excitation
UNSPECIFIED (1998) Coherent structures in quantum systems with two coupled types of excitation. PHYSICAL REVIEW E, 57 (3 Part A). pp. 2660-2674. ISSN 1063-651XFull text not available from this repository.
This paper investigates the consequences of coupling two different types of quantum quasiparticle in many-body systems. It utilizes a nonlinear held theoretical approach. Four main cases have been studied depending on the statistics of the component quasiparticles and the attendant equations of motion for the quantum fields have been derived. In each case Poincare sections reveal the presence of chaotic as well as regular behavior in the phase space. Within the class of regular orbits our interest is focused on separatrices and the appearance and disappearance of periodic solutions. The general method is illustrated by two examples: (a) distinguishable fermion particles and (b) an electron-phonon system. In the latter case we derive criteria for the emergence of localized states.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||PHYSICAL REVIEW E|
|Publisher:||AMERICAN PHYSICAL SOC|
|Number:||3 Part A|
|Number of Pages:||15|
|Page Range:||pp. 2660-2674|
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