K Yu Bliokh 2003 J. Phys. A: Math. Gen. 36 1705 doi:10.1088/0305-4470/36/6/313
K Yu Bliokh
Show affiliationsThe equation of a linear oscillator with adiabatically varying eigenfrequency ω(εt) (ε
1 is the adiabaticity parameter) is considered. The asymptotic solutions to the equation have been obtained to terms of order ε3. It is shown that imaginary terms of order ε2 form a generalized geometric phase determined by the geometry of the system's contour in the plane (ω, ω'). The real terms of orders ε and ε3, as predicted (Bliokh K Yu 2002 J. Math. Phys. 43 5624), do not form geometric amplitudes but are responsible for local relationships between the solution amplitudes and the parameters, that is, for adiabatic invariants.
81Q70 Differential-geometric methods, including holonomy, Berry and Hannay phases, etc.
Issue 6 (14 February 2003)
Received 16 August 2002, in final form 29 November 2002
Published 29 January 2003
K Yu Bliokh 2003 J. Phys. A: Math. Gen. 36 1705
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