Volume 78, Number 1, April 2007
Article Number 10002
Number of page(s) 6
Section General
Published online 12 March 2007
EPL, 78 (2007) 10002
DOI: 10.1209/0295-5075/78/10002

A ring accelerator for matter-wave solitons

A. V. Carpentier and H. Michinel

Área de Óptica, Facultade de Ciencias de Ourense, Universidade de Vigo - As Lagoas s/n, Ourense, E-32004 Spain

received 2 January 2007; accepted in final form 8 February 2007; published April 2007
published online 12 March 2007

We describe a new technique to accelerate and control a confined cloud of ultracold neutral atoms. In our configuration, a Bose-Einstein condensate trapped in a ring is accelerated by using an amplitude-modulated optical potential. The spreading of the atomic cloud is avoided by an adequate tuning of the scattering length. We also discuss other variations that offer new possibilities of robust control of atomic solitons. Our numerical results show that this cold matter accelerator is easily accessible in the frame of current experiments.

03.75.Kk - Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow.
03.75.Lm - Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations.

© Europhysics Letters Association 2007