Loading of bosons in optical lattices into the p band
2011 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 84, no 2, 023621- p.Article in journal (Refereed) Published
We present a method for transferring bosonic atoms residing on the lowest s band of an optical lattice to the first excited p bands. Our idea hinges on resonant tunneling between adjacent sites of accelerated lattices. The acceleration effectively shifts the quasibound energies on each site such that the system can be cast into a Wannier-Stark ladder problem. By adjusting the acceleration constant, a situation of resonant tunneling between the s and p bands is achievable. Within a mean-field model, considering (87)Rb atoms, we demonstrate population transfer from the s to the p bands with around 95% efficiency. Nonlinear effects deriving from atom-atom interactions, as well as coupling of the quasibound Wannier-Stark states to the energy continuum, are considered.
Place, publisher, year, edition, pages
2011. Vol. 84, no 2, 023621- p.
IdentifiersURN: urn:nbn:se:su:diva-68280DOI: 10.1103/PhysRevA.84.023621ISI: 000293917200014OAI: oai:DiVA.org:su-68280DiVA: diva2:477989
authorCount :22012-01-152012-01-032012-01-15Bibliographically approved