We consider the Cauchy problem of a system of quadratic derivative nonlinear
Schrödinger equations which was introduced by M. Colin and T. Colin (2004)
as a model of laser-plasma interaction. For the nonperiodic setting, they
proved some well-posedness results, which contain the scaling critical case for
. In
the present paper, we prove the well-posedness of this system for the periodic setting.
In particular, well-posedness is proved at the scaling critical regularity for
under
some conditions for the coefficients of the Laplacian. We also prove some ill-posedness
results. As long as we use an iteration argument, our well-posedness results are
optimal except for some critical cases.