--- res: bibo_abstract: - Motivated by recent experimental observations of coherent many-body revivals in a constrained Rydbergatom chain, we construct a weak quasilocal deformation of the Rydberg-blockaded Hamiltonian, whichmakes the revivals virtually perfect. Our analysis suggests the existence of an underlying nonintegrableHamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-bodyHilbert space. We show that such perfect dynamics necessitates the existence of atypical, nonergodicenergy eigenstates—quantum many-body scars. Furthermore, using these insights, we construct a toymodel that hosts exact quantum many-body scars, providing an intuitive explanation of their origin. Ourresults offer specific routes to enhancing coherent many-body revivals and provide a step towardestablishing the stability of quantum many-body scars in the thermodynamic limit.@eng bibo_authorlist: - foaf_Person: foaf_givenName: Soonwon foaf_name: Choi, Soonwon foaf_surname: Choi - foaf_Person: foaf_givenName: Christopher J. foaf_name: Turner, Christopher J. foaf_surname: Turner - foaf_Person: foaf_givenName: Hannes foaf_name: Pichler, Hannes foaf_surname: Pichler - foaf_Person: foaf_givenName: Wen Wei foaf_name: Ho, Wen Wei foaf_surname: Ho - foaf_Person: foaf_givenName: Alexios foaf_name: Michailidis, Alexios foaf_surname: Michailidis foaf_workInfoHomepage: http://www.librecat.org/personId=36EBAD38-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0002-8443-1064 - foaf_Person: foaf_givenName: Zlatko foaf_name: Papić, Zlatko foaf_surname: Papić - foaf_Person: foaf_givenName: Maksym foaf_name: Serbyn, Maksym foaf_surname: Serbyn foaf_workInfoHomepage: http://www.librecat.org/personId=47809E7E-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0002-2399-5827 - foaf_Person: foaf_givenName: Mikhail D. foaf_name: Lukin, Mikhail D. foaf_surname: Lukin - foaf_Person: foaf_givenName: Dmitry A. foaf_name: Abanin, Dmitry A. foaf_surname: Abanin bibo_doi: 10.1103/PhysRevLett.122.220603 bibo_issue: '22' bibo_volume: 122 dct_date: 2019^xs_gYear dct_identifier: - UT:000470885800005 dct_isPartOf: - http://id.crossref.org/issn/00319007 - http://id.crossref.org/issn/10797114 dct_language: eng dct_publisher: American Physical Society@ dct_title: Emergent SU(2) dynamics and perfect quantum many-body scars@ ...