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The spectral flow in the supersymmetric {\it t-J} model with $1/r^2$interaction is studied by analyzing the exact spectrum with twisted boundaryconditions. The spectral flows for the charge and spin sectors are shown tonicely fit in with the motif picture in the asymptotic Bethe ansatz. Althoughfractional exclusion statistics for the spin sector clearly shows up in theperiod of the spectral flow at half filling, such a property is generallyhidden once any number of holes are doped, because the commensurabilitycondition in the motif is not met in the metallic phase.Comment: 8 pages, revtex, Phys. Rev. B54 (1996) August 15, in pres

physical review. b, condensed matter

Spectral flow in the supersymmetric<i>t</i>-<i>J</i>model with a 1/<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">r</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>interaction

Spectral flow in the supersymmetrict-Jmodel with a 1/r2interaction