



@article {2808,
	title = {Rainbow Scars: From Area to Volume Law},
	year = {2021},
	month = {7/12/2021},
	abstract = {<p>Quantum many-body scars (QMBS) constitute a new quantum dynamical regime in which rare \&quot;scarred\&quot; eigenstates mediate weak ergodicity breaking. One open question is to understand the most general setting in which these states arise. In this work, we develop a generic construction that embeds a new class of QMBS, rainbow scars, into the spectrum of an arbitrary Hamiltonian. Unlike other examples of QMBS, rainbow scars display extensive bipartite entanglement entropy while retaining a simple entanglement structure. Specifically, the entanglement scaling is volume-law for a random bipartition, while scaling for a fine-tuned bipartition is sub-extensive. When internal symmetries are present, the construction leads to multiple, and even towers of rainbow scars revealed through distinctive non-thermal dynamics. To this end, we provide an experimental road map for realizing rainbow scar states in a Rydberg-atom quantum simulator, leading to coherent oscillations distinct from the strictly sub-volume-law QMBS previously realized in the same system.\&nbsp;</p>},
	url = {https://arxiv.org/abs/2107.03416},
	author = {Christopher M. Langlett and Zhi-Cheng Yang and Julia Wildeboer and Alexey V. Gorshkov and Thomas Iadecola and Shenglong Xu}
}
