Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-02-03
Physics
Condensed Matter
Quantum Gases
17 pages, 5 figures, to appear in New Journal of Physics
Scientific paper
We propose a scheme of "$R$-type" photoassociative adiabatic passage (PAP) to create polar molecular condensates from two different species of ultracold atoms. Due to the presence of a quasi-coherent population trapping state in the scheme, it is possible to associate atoms into molecules with a \textit{low-power} photoassociation (PA) laser. One remarkable advantage of our scheme is that a tunable atom-molecule coupling strength can be achieved by using a time-dependent PA field, which exhibits larger flexibility than using a tunable magnetic field. In addition, our results show that the PA intensity required in the "$R$-type" PAP could be greatly reduced compared to that in a conventional "$\Lambda $-type" one.
Qian Jing
Zhang Keye
Zhang Weiping
Zhou Lu
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