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We calculate the doublet and quartet neutron-deuteron scattering lengthsusing a nonlocal nucleon-nucleon interaction fully derived from quark-quarkinteractions. We use as input the $NN$ $^1S_0$ and $^3S_1$-${}^3 D_1$ partialwaves. Our result for the quartet scattering length agrees well with theexperimental value while the result for the doublet scattering length does not.However, if we take the result for the doublet scattering length together withthe one for the triton binding energy they agree well with the so-calledPhillips line.

$nd$ scattering lengths from a quark-model based $NN$ interaction