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We study one dimensional Bose liquids of interacting ultracold atoms in theY-shaped potential when each branch is filled with atoms. We find that theexcitation packet incident on a single Y-junction should experience a negativedensity reflection analogous to the Andreev reflection at normal-superconductorinterfaces, although the present system does not contain fermions. In a ringinterferometer type configuration, we find that the transport is completelyinsensitive to the (effective) flux contained in the ring, in contrast to theAharonov-Bohm effect of a single particle in the same geometry.Comment: 4 pages, 2 figures, final versio

physical review letters

Dynamics of One-Dimensional Bose Liquids: Andreev-Like Reflection at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Y</mml:mi></mml:math>Junctions and the Absence of the Aharonov-Bohm Effect

Dynamics of One-Dimensional Bose Liquids: Andreev-Like Reflection atYJunctions and the Absence of the Aharonov-Bohm Effect