TY - JOUR
T1 - Nonlinear adiabatic passage from fermion atoms to boson molecules
AU - Pazy, E.
AU - Tikhonenkov, I.
AU - Band, Y. B.
AU - Fleischhauer, M.
AU - Vardi, A.
PY - 2005/10/21
Y1 - 2005/10/21
N2 - We study the dynamics of an adiabatic sweep through a Feshbach resonance in a quantum gas of fermionic atoms. Analysis of the dynamical equations, supported by mean-field and many-body numerical results, shows that the dependence of the remaining atomic fraction Î" on the sweep rate α varies from exponential Landau-Zener behavior for a single pair of particles to a power-law dependence for large particle number N. The power law is linear, Î"â α, when the initial molecular fraction is smaller than the 1/N quantum fluctuations, and Î"â α1/3 when it is larger. Experimental data agree well with a linear dependence, but do not conclusively rule out the Landau-Zener model.
AB - We study the dynamics of an adiabatic sweep through a Feshbach resonance in a quantum gas of fermionic atoms. Analysis of the dynamical equations, supported by mean-field and many-body numerical results, shows that the dependence of the remaining atomic fraction Î" on the sweep rate α varies from exponential Landau-Zener behavior for a single pair of particles to a power-law dependence for large particle number N. The power law is linear, Î"â α, when the initial molecular fraction is smaller than the 1/N quantum fluctuations, and Î"â α1/3 when it is larger. Experimental data agree well with a linear dependence, but do not conclusively rule out the Landau-Zener model.
UR - http://www.scopus.com/inward/record.url?scp=28844458882&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.95.170403
DO - 10.1103/PhysRevLett.95.170403
M3 - Article
C2 - 16383800
AN - SCOPUS:28844458882
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
M1 - 170403
ER -