Proper phase imprinting method for a dark soliton excitation in a superfluid Fermi mixture

Abstract

It is common knowledge that a dark soliton can be excited in an ultra-cold atomic gas by means of the phase imprinting method. We show that, for a superfluid fermionic mixture, the standard phase imprinting procedure applied to both components fails to create a state with symmetry properties identical to those of the dark soliton solution of the Bogoliubov-de Gennes equations. To produce a dark soliton in the BCS regime, a single component of the Fermi mixture should be phase imprinted only.

5 pages, 2 figures, version accepted for publication in Phys. Rev. A Rapid Communications

References in corpus (2)

• Many-Body Physics with Ultracold Gases
• Traveling Dark Solitons in Superfluid Fermi Gases

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• Finding the stable mechanism of ring solitons in two-dimensional Fermi superfluids
• Drag-induced dynamical formation of dark solitons in Bose mixture on a ring