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Title: Coherent cooling of atoms in a frequency-modulated standing laser wave: Wave function and stochastic trajectory approaches

The wave function of a moderately cold atom in a stationary near-resonant standing light wave delocalizes very fast due to wave packet splitting. However, we show that frequency modulation of the field can suppress packet splitting for some atoms whose specific velocities are in a narrow range. These atoms remain localized in a small space for a long time. We demonstrate and explain this effect numerically and analytically. We also demonstrate that the modulated field can not only trap but also cool the atoms. We perform a numerical experiment with a large atomic ensemble having wide initial velocity and energy distributions. During the experiment, most of atoms leave the wave while the trapped atoms have a narrow energy distribution.
Authors:
 [1]
  1. Russian Academy of Sciences, Pacific Oceanological Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22309110
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 119; Journal Issue: 5; Other Information: Copyright (c) 2014 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; COOLING; ENERGY SPECTRA; FREQUENCY MODULATION; LASERS; STANDING WAVES; STOCHASTIC PROCESSES; TRAPPING; WAVE FUNCTIONS; WAVE PACKETS