  The energy spectrum of two 0-branes for fixed angular momentum in 2+1
dimensions is calculated by the Rayleigh-Ritz method. The basis function used
for each angular momentum consists of 80 eigenstates of the harmonic oscillator
problem on the corresponding space. It is seen that the spectrum exhibits a
definite linear Regge trajectory behavior. It is argued how this behavior
supports the picture by which the bound-states of quarks and QCD-strings are
governed by the quantum mechanics of matrix coordinates.
