  In two-dimensional electron systems with broken inversion and time-reversal
symmetries, a Josephson junction reveals an anomalous response: the
supercurrent is nonzero even at zero phase difference between two
superconductors. We consider details of this peculiar phenomenon in the planar
double-barrier configurations of hybrid circuits, where the noncentrosymmetric
normal region is described in terms of the paradigmatic Rashba model of
spin-orbit coupling. We analyze this anomalous Josephson effect by means of
both the Ginzburg-Landau formalism and the microscopic Green's functions
approach in the clean limit. The magnitude of the critical current is
calculated for an arbitrary in-plane magnetic field orientation, and anomalous
phase shifts in the Josephson current-phase relation are determined in terms of
the parameters of the model in several limiting cases.
