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Weak Ergodicity Breaking and Quantum Many-Body Scars in Spin-1 XY Magnets
Open accessAbstract
We study the spin-1 XY model on a hypercubic lattice in d dimensions and show that this well-known nonintegrable model hosts an extensive set of anomalous finite-energy-density eigenstates with remarkable properties. Namely, they exhibit subextensive entanglement entropy and spatiotemporal long-range order, both believed to be impossible in typical highly excited eigenstates of nonintegrable quantum many-body systems. While generic initial states are expected to thermalize, we show analytically that the eigenstates we construct lead to weak ergodicity breaking in the form of persistent oscillations of local observables following certain quantum quenches-in other words, these eigenstates provide an archetypal example of so-called quantum many-body scars. This Letter opens the door to the analytical study of the microscopic origin, dynamical signatures, and stability of such phenomena.
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Probing many-body dynamics on a 51-atom quantum simulator
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From quantum chaos and eigenstate thermalization to statistical mechanics and thermodynamics
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Rigorous results on valence-bond ground states in antiferromagnets
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Colloquium : Many-body localization, thermalization, and entanglement
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Average entropy of a subsystem
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Concept of Off-Diagonal Long-Range Order and the Quantum Phases of Liquid He and of Superconductors
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Rigorous Results on Valence-Bond Ground States in Antiferromagnets
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Metadata
- Authors
- Schecter, M., & Iadecola, T.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2019-10-01
- Volume
- 123
- Issue
- 14
- Pages
- 147201-147201
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2954597801
- Cited by
- 298
- References
- 32
- FWCI
- 15.89
- Type
- journal article
- Language
- en
- Open access
- green
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