%0 Journal Article %1 doi:10.1146/annurev-conmatphys-031620-101617 %A Chandran, Anushya %A Iadecola, Thomas %A Khemani, Vedika %A Moessner, Roderich %D 2022 %J Annu. Rev. Condens. Matter Phys. %K b %N 1 %P 443-469 %R 10.1146/annurev-conmatphys-031620-101617 %T Quantum many-body scars: A quasiparticle perspective %U /brokenurl# https://doi.org/10.1146/annurev-conmatphys-031620-101617 %V 14 %X Weakly interacting quasiparticles play a central role in the low-energy description of many phases of quantum matter. At higher energies, however, quasiparticles cease to be well defined in generic many-body systems owing to a proliferation of decay channels. In this review, we discuss the phenomenon of quantum many-body scars, which can give rise to certain species of stable quasiparticles throughout the energy spectrum. This goes along with a set of unusual nonequilibrium phenomena including many-body revivals and nonthermal stationary states. We provide a pedagogical exposition of this physics via a simple yet comprehensive example, that of a spin-1 XY model. We place our discussion in the broader context of symmetry-based constructions of many-body scar states, projector embeddings, and Hilbert space fragmentation. We conclude with a summary of experimental progress and theoretical puzzles.

@article{doi:10.1146/annurev-conmatphys-031620-101617, abstract = { Weakly interacting quasiparticles play a central role in the low-energy description of many phases of quantum matter. At higher energies, however, quasiparticles cease to be well defined in generic many-body systems owing to a proliferation of decay channels. In this review, we discuss the phenomenon of quantum many-body scars, which can give rise to certain species of stable quasiparticles throughout the energy spectrum. This goes along with a set of unusual nonequilibrium phenomena including many-body revivals and nonthermal stationary states. We provide a pedagogical exposition of this physics via a simple yet comprehensive example, that of a spin-1 XY model. We place our discussion in the broader context of symmetry-based constructions of many-body scar states, projector embeddings, and Hilbert space fragmentation. We conclude with a summary of experimental progress and theoretical puzzles. }, added-at = {2023-11-22T17:10:13.000+0100}, author = {Chandran, Anushya and Iadecola, Thomas and Khemani, Vedika and Moessner, Roderich}, biburl = {https://www.bibsonomy.org/bibtex/2a96cd2c20340428608f2a807694e5be0/ctqmat}, day = 21, doi = {10.1146/annurev-conmatphys-031620-101617}, eprint = {https://doi.org/10.1146/annurev-conmatphys-031620-101617}, interhash = {8626843b7e2c43f678d5a4b3271b724e}, intrahash = {a96cd2c20340428608f2a807694e5be0}, journal = {Annu. Rev. Condens. Matter Phys.}, keywords = {b}, month = {12}, number = 1, pages = {443-469}, timestamp = {2023-11-22T18:57:37.000+0100}, title = {Quantum many-body scars: A quasiparticle perspective}, url = {/brokenurl# https://doi.org/10.1146/annurev-conmatphys-031620-101617 }, volume = 14, year = 2022 }