Artigo
Free expansion of fermionic dark solitons in a boson-fermion mixture
Fecha
2005-10-14Registro en:
Journal of Physics B-atomic Molecular and Optical Physics. Bristol: Iop Publishing Ltd, v. 38, n. 19, p. 3607-3617, 2005.
0953-4075
10.1088/0953-4075/38/19/013
WOS:000233812600016
8031087349809439
Autor
Universidade Estadual Paulista (Unesp)
Resumen
We use a time-dependent dynamical mean-field-hydrodynamic model to study the formation of fermionic dark solitons in a trapped degenerate Fermi gas mixed with a Bose-Einstein condensate in a harmonic as well as a periodic optical-lattice potential. The dark soliton with a 'notch' in the probability density with a zero at the minimum is simulated numerically as a nonlinear continuation of the first vibrational excitation of the linear mean-field-hydrodynamic equations, as suggested recently for pure bosons. We study the free expansion of these dark solitons as well as the consequent increase in the size of their central notch and discuss the possibility of experimental observation of the notch after free expansion.