Symmetric Absolutely Separable states

This talk explores recent advances in the study of multiqubit symmetric states. We first investigate the maximal entanglement achievable under symmetry-preserving unitary transformations, quantified via negativity. Next, we introduce novel separability criteria for symmetric states, addressing the problem of absolute separability. Finally, we examine the relationship between absolutely separable and absolutely positive partial transposed (PPT) states in the symmetric case, discussing their equivalence. These results provide deeper insights into the entanglement and separability structure of symmetric quantum states.