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Superfluidity breakdown of periodic matter waves in quasi one-dimensional annul...
Yulin, Alex V.; Bludov, Yuliy V.; Konotop, Vladimir V.; Kuzmiak, Vladimir; Salerno, MarioWe investigate, both analytically and numerically, the quasisuperfluidity properties of periodic Bose-Einstein condensates (BECs) in a quasi-one-dimensional (1D) ring with optical lattices (OL) of different kinds (linear and nonlinear) and with a moving defect of an infinite mass inside. To study the dynamics of the condensate we used a mean-field approximation describing the condensate by use of the Gross-Pita...
Superfuidity of Bose-Einstein condensates in toroidal traps with nonlinear latt...
Yulin, Alex V.; Bludov, Yuliy V.; Konotop, Vladimir V.; Kuzmiak, Vladimir; Salerno, MarioSuperfluid properties of Bose-Einstein condensates (BEC) in toroidal quasi-one-dimensional traps are investigated in the presence of periodic scattering length modulations along the ring. The existence of several types of stable periodic waves, ranging from almost uniform to very fragmented chains of weakly interacting and equally spaced solitons, is demonstrated.We show that these waves may support persistent ...
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