---
res:
  bibo_abstract:
  - 'Recent realization of a kinetically constrained chain of Rydberg atoms by Bernien
    et al., [Nature (London) 551, 579 (2017)] resulted in the observation of unusual
    revivals in the many-body quantum dynamics. In our previous work [C. J. Turner
    et al., Nat. Phys. 14, 745 (2018)], such dynamics was attributed to the existence
    of “quantum scarred” eigenstates in the many-body spectrum of the experimentally
    realized model. Here, we present a detailed study of the eigenstate properties
    of the same model. We find that the majority of the eigenstates exhibit anomalous
    thermalization: the observable expectation values converge to their Gibbs ensemble
    values, but parametrically slower compared to the predictions of the eigenstate
    thermalization hypothesis (ETH). Amidst the thermalizing spectrum, we identify
    nonergodic eigenstates that strongly violate the ETH, whose number grows polynomially
    with system size. Previously, the same eigenstates were identified via large overlaps
    with certain product states, and were used to explain the revivals observed in
    experiment. Here, we find that these eigenstates, in addition to highly atypical
    expectation values of local observables, also exhibit subthermal entanglement
    entropy that scales logarithmically with the system size. Moreover, we identify
    an additional class of quantum scarred eigenstates, and discuss their manifestations
    in the dynamics starting from initial product states. We use forward scattering
    approximation to describe the structure and physical properties of quantum scarred
    eigenstates. Finally, we discuss the stability of quantum scars to various perturbations.
    We observe that quantum scars remain robust when the introduced perturbation is
    compatible with the forward scattering approximation. In contrast, the perturbations
    which most efficiently destroy quantum scars also lead to the restoration of “canonical”
    thermalization.@eng'
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: C J
      foaf_name: Turner, C J
      foaf_surname: Turner
  - 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: D A
      foaf_name: Abanin, D A
      foaf_surname: Abanin
  - 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: Z
      foaf_name: Papić, Z
      foaf_surname: Papić
  bibo_doi: 10.1103/PhysRevB.98.155134
  bibo_issue: '15'
  bibo_volume: 98
  dct_date: 2018^xs_gYear
  dct_identifier:
  - UT:000447919100001
  dct_language: eng
  dct_publisher: American Physical Society@
  dct_title: 'Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown
    of thermalization, and stability to perturbations@'
...