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Title: Coherent Decay of Bose-Einstein Condensates

Abstract

Atomic Bose-Einstein condensates are singular forms of matter with the coherence between constituent atoms as a defining characteristic. Although this viewpoint is increasingly validated through experimental findings, the mechanisms behind the observed losses are still understood with classical recombinant collision arguments between particles within the condensate itself. By incorporating a general interparticle interaction into the Hamiltonian, a coherent decay rate can be obtained, thus providing a direct link between the observed losses and the microscopic two-body parameters. Appearing in the lifetime, the interaction strength, {lambda}, is expressed as {lambda}=8{pi}a/(1-{delta}), where the small parameter {delta} is obtained from a fit to experimental loss data. Most importantly, the lowest order rate exhibits a novel density dependence ({rho}{sup 3/2}) that can be identified in low temperature tests.

Authors:
 [1];  [2]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. Center for Theoretical Physics, Laboratory for Nuclear Science, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
20957670
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevLett.98.080405; (c) 2007 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; BOSE-EINSTEIN CONDENSATION; COLLISIONS; HAMILTONIANS; LIFETIME; MATTER; TWO-BODY PROBLEM

Citation Formats

Cragg, George E., and Kerman, Arthur K. Coherent Decay of Bose-Einstein Condensates. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.080405.
Cragg, George E., & Kerman, Arthur K. Coherent Decay of Bose-Einstein Condensates. United States. doi:10.1103/PHYSREVLETT.98.080405.
Cragg, George E., and Kerman, Arthur K. Fri . "Coherent Decay of Bose-Einstein Condensates". United States. doi:10.1103/PHYSREVLETT.98.080405.
@article{osti_20957670,
title = {Coherent Decay of Bose-Einstein Condensates},
author = {Cragg, George E. and Kerman, Arthur K.},
abstractNote = {Atomic Bose-Einstein condensates are singular forms of matter with the coherence between constituent atoms as a defining characteristic. Although this viewpoint is increasingly validated through experimental findings, the mechanisms behind the observed losses are still understood with classical recombinant collision arguments between particles within the condensate itself. By incorporating a general interparticle interaction into the Hamiltonian, a coherent decay rate can be obtained, thus providing a direct link between the observed losses and the microscopic two-body parameters. Appearing in the lifetime, the interaction strength, {lambda}, is expressed as {lambda}=8{pi}a/(1-{delta}), where the small parameter {delta} is obtained from a fit to experimental loss data. Most importantly, the lowest order rate exhibits a novel density dependence ({rho}{sup 3/2}) that can be identified in low temperature tests.},
doi = {10.1103/PHYSREVLETT.98.080405},
journal = {Physical Review Letters},
number = 8,
volume = 98,
place = {United States},
year = {Fri Feb 23 00:00:00 EST 2007},
month = {Fri Feb 23 00:00:00 EST 2007}
}