Abstract
The harmonic oscillator with time-dependent parameters proved to be an effective model of various phenomena and is widely used in different fields of physics. In quantum optics the time-dependent mass can describe an external influence on the quantised electromagnetic field, e.g., in a decaying or driven Fabry-Perot cavity. One kind of ion-trap, called Paul-trap, can be described by a one-dimensional harmonic oscillator with changing frequency for each rectangular coordinate.
© 1994 IEEE
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