In condensed matter physics, the search for new exotic quantum ground states has become a central theme over the past few years. The diversity of exotic ground-states observed in the titanate pyrochlores has been the subject of intense research. However, the low temperature magnetic properties of other pyrochlores, such as the zirconates, have been largely overlooked up to now, in part because of difficulties related to their synthesis. However, potential quantum spin liquid (QSL) candidates do exist within this zirconate family, and we propose to carry out the first neutron study of the QSL candidate 154Sm2Zr2O7. This is made possible thanks to the acquisition by our team of a significant mass of the non-absorbing isotope element 154Sm.We now propose to carry out an inelastic neutron scattering study of the new quantum spin ice candidate Sm2Zr2O7 in order to determine all the crystal field levels appropriate to Sm3+, a crucial first step for the determination of its magnetic anisotropy and to confirm the relevance of the Seff=1/2 model in this case. In addition, we intend to identify the nature of the magnetic correlations present at very low temperature using polarized neutrons