Quantum Many-Body Scars: A Quasiparticle Perspective
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2022
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| _version_ | 1866913191927218176 |
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| author | Chandran, Anushya Iadecola, Thomas Khemani, Vedika Moessner, Roderich |
| author_facet | Chandran, Anushya Iadecola, Thomas Khemani, Vedika Moessner, Roderich |
| contents | 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 due 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 non-equilibrium phenomena including many-body revivals and non-thermal 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2206_11528 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Quantum Many-Body Scars: A Quasiparticle Perspective Chandran, Anushya Iadecola, Thomas Khemani, Vedika Moessner, Roderich Strongly Correlated Electrons Quantum Gases Statistical Mechanics Quantum Physics 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 due 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 non-equilibrium phenomena including many-body revivals and non-thermal 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. |
| title | Quantum Many-Body Scars: A Quasiparticle Perspective |
| topic | Strongly Correlated Electrons Quantum Gases Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2206.11528 |