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Title: Ultracold Molecule Production via a Resonant Oscillating Magnetic Field

Abstract

A novel atom-molecule conversion technique has been investigated. Ultracold {sup 85}Rb atoms sitting in a dc magnetic field near the 155 G Feshbach resonance are associated by applying a small sinusoidal oscillation to the magnetic field. There is resonant atom to molecule conversion when the modulation frequency closely matches the molecular binding energy. We observe that the atom to molecule conversion efficiency depends strongly on the frequency, amplitude, and duration of the applied modulation and on the phase space density of the sample. This technique offers high conversion efficiencies without the necessity of crossing or closely approaching the Feshbach resonance and allows precise spectroscopic measurements. Efficiencies of 55% have been observed for pure Bose-Einstein condensates.

Authors:
; ;  [1];  [2]
  1. JILA, National Institute of Standards and Technology (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20699523
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 19; Other Information: DOI: 10.1103/PhysRevLett.95.190404; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOM-ATOM COLLISIONS; ATOMS; BINDING ENERGY; BOSE-EINSTEIN CONDENSATION; MAGNETIC FIELDS; MODULATION; MOLECULES; OSCILLATIONS; PHASE SPACE; RESONANCE; RUBIDIUM 85

Citation Formats

Thompson, S.T., Hodby, E., Wieman, C.E., and University of Colorado, and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440. Ultracold Molecule Production via a Resonant Oscillating Magnetic Field. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.190404.
Thompson, S.T., Hodby, E., Wieman, C.E., & University of Colorado, and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440. Ultracold Molecule Production via a Resonant Oscillating Magnetic Field. United States. doi:10.1103/PhysRevLett.95.190404.
Thompson, S.T., Hodby, E., Wieman, C.E., and University of Colorado, and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440. Fri . "Ultracold Molecule Production via a Resonant Oscillating Magnetic Field". United States. doi:10.1103/PhysRevLett.95.190404.
@article{osti_20699523,
title = {Ultracold Molecule Production via a Resonant Oscillating Magnetic Field},
author = {Thompson, S.T. and Hodby, E. and Wieman, C.E. and University of Colorado, and the Department of Physics, University of Colorado, Boulder, Colorado 80309-0440},
abstractNote = {A novel atom-molecule conversion technique has been investigated. Ultracold {sup 85}Rb atoms sitting in a dc magnetic field near the 155 G Feshbach resonance are associated by applying a small sinusoidal oscillation to the magnetic field. There is resonant atom to molecule conversion when the modulation frequency closely matches the molecular binding energy. We observe that the atom to molecule conversion efficiency depends strongly on the frequency, amplitude, and duration of the applied modulation and on the phase space density of the sample. This technique offers high conversion efficiencies without the necessity of crossing or closely approaching the Feshbach resonance and allows precise spectroscopic measurements. Efficiencies of 55% have been observed for pure Bose-Einstein condensates.},
doi = {10.1103/PhysRevLett.95.190404},
journal = {Physical Review Letters},
number = 19,
volume = 95,
place = {United States},
year = {Fri Nov 04 00:00:00 EST 2005},
month = {Fri Nov 04 00:00:00 EST 2005}
}