skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fluctuations in the formation time of ultracold dimers from fermionic atoms

Abstract

We investigate the temporal fluctuations characteristic of the formation of molecular dimers from ultracold fermionic atoms via Raman photoassociation. The quantum fluctuations inherent to the initial atomic state result in large fluctuations in the passage time from atoms to molecules. Assuming degeneracy of kinetic energies of atoms in the strong coupling limit, we find that a heuristic classical stochastic model yields qualitative agreement with the full quantum treatment in the initial stages of the dynamics. We also show that in contrast to the association of atoms into dimers, the reverse process of dissociation from a condensate of bosonic dimers exhibits little passage time fluctuations. Finally, we explore effects due to the nondegeneracy of atomic kinetic energies.

Authors:
; ; ;  [1]
  1. Optical Sciences Center and Department of Physics, The University of Arizona, Tucson, Arizona 85721 (United States)
Publication Date:
OSTI Identifier:
20786562
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 72; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.72.053616; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; COUPLING; DIMERS; DISSOCIATION; FERMIONS; FLUCTUATIONS; KINETIC ENERGY; MOLECULES; RAMAN SPECTRA; STOCHASTIC PROCESSES

Citation Formats

Uys, H., Miyakawa, T., Meiser, D., and Meystre, P. Fluctuations in the formation time of ultracold dimers from fermionic atoms. United States: N. p., 2005. Web. doi:10.1103/PHYSREVA.72.0.
Uys, H., Miyakawa, T., Meiser, D., & Meystre, P. Fluctuations in the formation time of ultracold dimers from fermionic atoms. United States. doi:10.1103/PHYSREVA.72.0.
Uys, H., Miyakawa, T., Meiser, D., and Meystre, P. Tue . "Fluctuations in the formation time of ultracold dimers from fermionic atoms". United States. doi:10.1103/PHYSREVA.72.0.
@article{osti_20786562,
title = {Fluctuations in the formation time of ultracold dimers from fermionic atoms},
author = {Uys, H. and Miyakawa, T. and Meiser, D. and Meystre, P.},
abstractNote = {We investigate the temporal fluctuations characteristic of the formation of molecular dimers from ultracold fermionic atoms via Raman photoassociation. The quantum fluctuations inherent to the initial atomic state result in large fluctuations in the passage time from atoms to molecules. Assuming degeneracy of kinetic energies of atoms in the strong coupling limit, we find that a heuristic classical stochastic model yields qualitative agreement with the full quantum treatment in the initial stages of the dynamics. We also show that in contrast to the association of atoms into dimers, the reverse process of dissociation from a condensate of bosonic dimers exhibits little passage time fluctuations. Finally, we explore effects due to the nondegeneracy of atomic kinetic energies.},
doi = {10.1103/PHYSREVA.72.0},
journal = {Physical Review. A},
number = 5,
volume = 72,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}