1 Department of Physics and Astronomy, Science and Technology, Aarhus University2 unknown3 Department of Physics and Astronomy, Science and Technology, Aarhus University
We investigate numerically the structural dynamics of ion Coulomb crystals confined in a three-dimensional harmonic trap when influenced by an additional one-dimensional optically induced periodical potential. We demonstrate that transitions between thermally excited crystal structures, such as body-centered cubic and face-centered cubic, can be suppressed by a proper choice of the potential depth and periodicity. Furthermore, by varying the harmonic trap parameters and/or the optical potential in time, controlled transitions between crystal structures can be obtained with close to unit efficiency.
Physical Review a (atomic, Molecular and Optical Physics), 2012, Vol 86, Issue 4