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… In the last decades, topology has also been recognized as a crucial characteristic to describe how matter is organized at the fundamental level. In this case, it is no longer the breaking of certain symmetries, but their conservation, which gives rise to novel states of matter, the so-called symmetry-protected topological (SPT) phases. Different topological phases might present the same symmetries, but they can be distinguished by a global topological invariant, which takes integer values and is preserved under continuous deformations. …
... In their study, the researchers demonstrated how, in the presence of strong interactions, a protecting symmetry emerges at low energies from the set of configurations constrained by the breaking of a different symmetry. This emergent symmetry stabilizes an intertwined topological phase, where the topological properties coexist with the presence of long-range order. Moreover, they demonstrate how this interplay gives rise to interesting static and dynamical effects, such as a topologically protected particle transport quantized to fractional values. ...
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