Thursday, February 9, 2012

1202.1689 (Patrick Köberle et al.)

Creating two-dimensional bright solitons in dipolar Bose-Einstein
condensates
   [PDF]

Patrick Köberle, Damir Zajec, Günter Wunner, Boris Malomed
We propose a realistic experimental setup for creating quasi-two-dimensional
(2D) bright solitons in dipolar Bose-Einstein condensates (BECs), the existence
of which was proposed in Phys. Rev. Lett. 100, 090406 (2008). A challenging
feature of the expected solitons is their strong inherent anisotropy, due to
the necessary in-plane orientation of the local moments in the dipolar gas.
This may be the first chance of making multidimensional matter-wave solitons,
as well as solitons featuring the anistropy due to their intrinsic dynamics.
Our analysis is based on the extended Gross-Pitaevskii equation, which includes
three-body losses and noise in the scattering length, induced by fluctuations
of currents inducing the necessary magnetic fields, which are factors crucial
to the adequate description of experimental conditions. By means of systematic
3D simulations, we find a ramping scenario for the change of the scattering
length and trap frequencies which results in the creation of robust solitons,
that readily withstand the concomitant excitation of the condensate.
View original: http://arxiv.org/abs/1202.1689

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