  We describe the design and operation of a surface-electrode Paul trap for
parallel entangling gate implementation. In particular, we demonstrate the
possibility of separating or coupling ion motion by adjusting the DC-voltages
on a set of electrodes and show the possibility of parallel MS-gate operations
for specific voltage configurations. We verify the scalability of this approach
and characterize the performance of these gates in the presence of the finite
phonon mode occupation and of the finite drift of the phonon frequencies.
Additionally, we investigate how the number of ions per individual trapping
site and anharmonic potential terms affect the coupling between the wells.
