## Abstract

We present results of calculations on Bose-Einstein-condensed [Formula Presented] atoms subjected to a moving standing-wave light potential of the form [Formula Presented] We calculate the mean-field dynamics (the order parameter) of the condensate and determine the resulting condensate momentum in the z direction, [Formula Presented] where [Formula Presented] is the peak optical potential strength and [Formula Presented] is the pulse duration. Although the local-density approximation for the Bogoliubov excitation spectral distribution is a good approximation for very low optical intensities, long pulse duration and sufficiently large values of the wave vector q of the light potential, for small q, short duration pulses, or for not-so-low intensities, the local-density perturbative description of the excitation spectrum breaks down badly, as shown by our results. 5555 2002 The American Physical Society.

Original language | English GB |
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Article number | 043614 |

Pages (from-to) | 5 |

Number of pages | 1 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 66 |

Issue number | 4 |

DOIs | |

State | Published - 1 Jan 2002 |

## ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics