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arxiv: 1205.6999 · v2 · pith:ZHCU67QPnew · submitted 2012-05-31 · 🪐 quant-ph · cond-mat.quant-gas

Dynamics of one-dimensional tight-binding models with arbitrary time-dependent external homogeneous fields

classification 🪐 quant-ph cond-mat.quant-gas
keywords time-dependentarbitraryexternalfieldfieldshomogeneousone-dimensionalpacket
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The exact propagators of two one-dimensional systems with time-dependent external fields are presented by following the path-integral method. It is shown that the Bloch acceleration theorem can be generalized to the impulse-momentum theorem in quantum version. We demonstrate that an evolved Gaussian wave packet always keeps its shape in an arbitrary time-dependent homogeneous driven field. Moreover, that stopping and accelerating of a wave packet can be achieved by the pulsed field in a diabatic way.

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