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arXiv:math-ph/0610076 · Journal of Physics A Mathematical and Theoretical

Berry phases for 3D Hartree-type equations with a quadratic potential and a uniform magnetic field

F. N. Litvinets, Alexander V. Shapovalov, Andrey Yu. Trifonov

Published Aug 21, 2007• 0 citations
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Abstract

A countable set of asymptotic space-localized solutions is constructed for a 3D Hartree-type equation with a quadratic potential by the complex germ method in the adiabatic approximation. The asymptotic parameter is 1/ T , where T ≫ 1 is the adiabatic evolution time. A generalization of the Berry phase of the linear Schrödinger equation is formulated for the Hartree-type equation. For the solutions constructed, the Berry phases are found in an explicit form.

DOI
10.1088/1751-8113/40/36/013

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A countable set of asymptotic space-localized solutions is constructed for a 3D Hartree-type equation with a quadratic potential by the complex germ method in the adiabatic approximation. The asymptotic parameter is 1/ T , where T ≫ 1 is the adiabatic evolution time. A generalization of the Berry phase of the linear Schrödinger equation is formulated for the Hartree-type equation. For the solutions constructed, the Berry phases are found in an explicit form.
Based on the ideology of the Maslov's complex germ theory, a method has been developed for finding an exact solution of the Cauchy problem for a Hartree-type equation with a quadratic potential in the class of semiclassically concentrated functions. The nonlinear evolution operator has been obtained in explicit form in the class of semiclassically concentrated functions. Parametric families of symmetry operators have been found for the Hartree-type equation. With the help of symmetry operators, families of exact solutions of the equation have been constructed. Exact expressions are obtained for the quasi-energies and their respective states. The Aharonov-Anandan geometric phases are found in explicit form for the quasi-energy states.
Considering that the classical evolution equations are similar to the Schrodinger eqaution, we point out that there is the structure of the Berry's Phase in the solution of a classical evolution eqaution with adiabatic changing parameters. Thus, we can use a classical evolution process to imitate the quantum adiabatic process. As an example, the motion of a charged particle in slowly-changing magnetic field is studied and the corresponding phase factor can be interpreted as a holomony of the fiber bundle on the sphare s~2 in the parameter space.