TY - JOUR
T1 - Adiabatic passage through a Feshbach resonance in a degenerate quantum gas
AU - Band, Y. B.
AU - Tikhonenkov, I.
AU - Pazy, E.
AU - Fleischhauer, M.
AU - Vardi, A.
N1 - Funding Information:
This work was supported in part by grants from the US–Israel Binational Science Foundation (grant Nos 2002214, 2002147), the Minerva Foundation through a grant for a Minerva Junior Research Group, the Israel Science Foundation for a Center of Excellence (grant No. 8006/03), and the German Federal Ministry of Education and Research (BMBF) through the DIP project.
PY - 2007/3/1
Y1 - 2007/3/1
N2 - The dynamics of an adiabatic sweep through a Feshbach resonance in a degenerate quantum gas of fermionic atoms to produce a degenerate quantum gas of diatomic molecules are studied using many-body and mean-field methods. We demonstrate that the dependence of the remaining fraction of atoms on sweep rate varies from exponential Landau-Zener behaviour for a single pair of particles, to a power-law dependence for a large number of atoms, N. Two different power-law behaviours are obtained depending on the initial molecular fraction. The two different regimes are described in terms of quantum fluctuations: a linear power-law, , is obtained when the initial molecular fraction is smaller than the 1/N quantum fluctuations, and 1/3 when it is larger.
AB - The dynamics of an adiabatic sweep through a Feshbach resonance in a degenerate quantum gas of fermionic atoms to produce a degenerate quantum gas of diatomic molecules are studied using many-body and mean-field methods. We demonstrate that the dependence of the remaining fraction of atoms on sweep rate varies from exponential Landau-Zener behaviour for a single pair of particles, to a power-law dependence for a large number of atoms, N. Two different power-law behaviours are obtained depending on the initial molecular fraction. The two different regimes are described in terms of quantum fluctuations: a linear power-law, , is obtained when the initial molecular fraction is smaller than the 1/N quantum fluctuations, and 1/3 when it is larger.
UR - http://www.scopus.com/inward/record.url?scp=34047243137&partnerID=8YFLogxK
U2 - 10.1080/09500340600777771
DO - 10.1080/09500340600777771
M3 - Article
AN - SCOPUS:34047243137
SN - 0950-0340
VL - 54
SP - 697
EP - 706
JO - Journal of Modern Optics
JF - Journal of Modern Optics
IS - 5
ER -