Journal
EUROPHYSICS LETTERS
Volume 62, Issue 5, Pages 622-628Publisher
EDP SCIENCES S A
DOI: 10.1209/epl/i2003-00419-1
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A unitary operator, which relates the system of a particle in a linear potential with time-dependent parameters to that of a free particle, has been given. This operator, closely related to the one which is responsible for the existence of coherent states for a harmonic oscillator, is used to find a general wave packet described by an Airy function. The kernel ( propagator) and a complete set of Hermite-Gaussian-type wave functions are also given.
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