The objective of the CoQuIA project is to optimize the efficiency and robustness to environmental variations of laser beamsplitters in atomic interferometers, through novel pulse shaping methods that take advantage of unconventional optics and optimal quantum control methods. The new methods and key technologies that we propose to develop within the framework of this project, as well as the intimate knowledge of their limitations in terms of performance, will allow the development of atomic sensors which will be better able to meet the expectations of users in the most demanding applications, in particular for on-board applications, such as inertial navigation.