Publications (4)
Band structure, elementary excitations, and stability of a Bose-Einstein condensate in a periodic potential
M. Machholm, C. J. Pethick, H. Smith
We investigate the band structure of a Bose-Einstein condensate in a one-dimensional periodic potential by calculating stationary solutions of the Gross-Pitaevskii equation which h…
Subthermal linewidths in photoassociation spectra of cold alkaline earth atoms
M. Machholm, Paul S. Julienne, K. -A. Suominen
Narrow s-wave features with subthermal widths are predicted for the ^1Pi_g photoassociation spectra of cold alkaline earth atoms. The phenomenon is explained by numerical and analy…
Spatial period-doubling in Bose-Einstein condensates in an optical lattice
M. Machholm, A. Nicolin, C. J. Pethick +1
We demonstrate that there exist stationary states of Bose-Einstein condensates in an optical lattice that do not satisfy the usual Bloch periodicity condition. Using the discrete m…
Calculations of collisions between cold alkaline earth atoms in a weak laser field
M. Machholm, Paul S. Julienne, K. -A. Suominen
We calculate the light-induced collisional loss of laser-cooled and trapped magnesium atoms for detunings up to 50 atomic linewidths to the red of the ^1S_0-^1P_1 cooling transitio…