TY - JOUR T1 - Effective-range description of a Bose gas under strong one- or two-dimensional confinement JF - New Journal of Physics Y1 - 2007 A1 - Pascal Naidon A1 - Eite Tiesinga A1 - William F. Mitchell A1 - Paul S. Julienne AB - We point out that theories describing s-wave collisions of bosonic atoms confined in one- or two-dimensional geometries can be extended to much tighter confinements than previously thought. This is achieved by replacing the scattering length by an energy-dependent scattering length which was already introduced for the calculation of energy levels under 3D confinement. This replacement accurately predicts the position of confinement-induced resonances in strongly confined geometries. VL - 9 U4 - 19 - 19 UR - http://arxiv.org/abs/physics/0607140v2 CP - 1 J1 - New J. Phys. U5 - 10.1088/1367-2630/9/1/019 ER -