We bring together researchers on quantum information theory, Bose-Einstein condensates and atom interferometry to create and detect entanglement of large, spatially separated samples. Our purpose is both to gain a deeper understanding of of quantum information in many body systems as well as to develop practical approaches for manipulating and exploiting it. The ultimate goal is to enhance the performance of a separated path atom interferometer using entangled samples. Atomic interactions in BEC's consititute a non-linearity highly analogous to four wave mixing or parametric down conversion in optics, and which can be exploited to create entanglement. Two separate lines of research have been pursued in the past; on the one hand one can use the spin degrees of freedom of an atom to produce atom pairs whose spins are entangled, and on the other one can entangle the motional degrees of freedom in a spirit close to that of the original EPR proposal. In the CEBBEC project, these two lines of research will be brought together in both the technological sense (using one kind of entanglement to make another) and conceptual one (studying complex situations in which both spin and motion are entangled) giving rise to new possibilites for applications and new theoretical challenges. The participating partners have developed sophisticated detection technologies which allow us to make new types of mesaurements. We intend to respond to the great need for theoretical work to understand and exploit them. Finally, we will address practical applications and explore their metrological validity. The EU's Future and Emerging Technologies agenda aims to foster transformative research in quantum information science by coordinating efforts of different research communities. Our project aims to bring together two separate lines of research in which European groups have been leading players and to exploit the common ground that they share. We plan to combine the manipulation of atomic spins and of motional degrees of freedom. The present project will develop a unified approach in both the technological sense (using one kind of entanglement to make another) and conceptual one (studying complex situations in which both spin and motion are entangled) giving rise to new possibilities for applications and new theoretical challenges. We plan to optimize the extraction of relevant information from (entangled) physical systems as discussed in the Target Outcomes of the Call Announcement. In this context, we may go even farther and achieve new or radically enhanced functionalities with our research.