期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.220603
关键词
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资金
- National Science Foundation (NSF)
- Center for Ultracold Atoms
- Air Force Office of Scientific Research via the MURI
- Vannevar Bush Faculty Fellowship
- National Science Foundation [NSF PHY-1748958]
- program The Dynamics of Quantum Information
- Miller Institute for Basic Research in Science
- NSF
- Moore Foundation's EPiQS Initiative [GBMF4306]
- Swiss NSF
- EPSRC [EP/P009409/1, EP/R020612/1, EP/M50807X/1]
- EPSRC [EP/P009409/1, EP/R020612/1] Funding Source: UKRI
Motivated by recent experimental observations of coherent many-body revivals in a constrained Rydberg atom chain, we construct a weak quasilocal deformation of the Rydberg-blockaded Hamiltonian, which makes the revivals virtually perfect. Our analysis suggests the existence of an underlying nonintegrable Hamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-body Hilbert space. We show that such perfect dynamics necessitates the existence of atypical, nonergodic energy eigenstates-quantum many-body scars. Furthermore, using these insights, we construct a toy model that hosts exact quantum many-body scars, providing an intuitive explanation of their origin. Our results offer specific routes to enhancing coherent many-body revivals and provide a step toward establishing the stability of quantum many-body scars in the thermodynamic limit.
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