Spin-charge separation in the quantum boomerang effect
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929287980908544 |
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| author | Capuzzi, Pablo Tessieri, Luca Akdeniz, Zehra Minguzzi, Anna Vignolo, Patrizia |
| author_facet | Capuzzi, Pablo Tessieri, Luca Akdeniz, Zehra Minguzzi, Anna Vignolo, Patrizia |
| contents | We study the localization dynamics of a SU(2) fermionic wavepacket launched in a (pseudo)random potential. We show that in the limit of strong inter-component repulsions, the total wavepacket exhibits a boomerang-like dynamics, returning near its initial position as expected for non-interacting particles, while separately each spin-component does not. This spin-charge separation effect occurs both in the infinite repulsive limit and at finite interactions. At infinite interactions, the system is integrable and thermalization cannot occur: the two spin-components push each other during the dynamics and their centers of mass stop further from each other than their initial position. At finite interactions, integrability is broken, the two spin-components oscillate and mix, with their center-of-mass positions converging very slowly to the center of mass of the whole system. This is a signature that the final localized state is a fully spin-mixed thermalized state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_16923 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin-charge separation in the quantum boomerang effect Capuzzi, Pablo Tessieri, Luca Akdeniz, Zehra Minguzzi, Anna Vignolo, Patrizia Quantum Gases We study the localization dynamics of a SU(2) fermionic wavepacket launched in a (pseudo)random potential. We show that in the limit of strong inter-component repulsions, the total wavepacket exhibits a boomerang-like dynamics, returning near its initial position as expected for non-interacting particles, while separately each spin-component does not. This spin-charge separation effect occurs both in the infinite repulsive limit and at finite interactions. At infinite interactions, the system is integrable and thermalization cannot occur: the two spin-components push each other during the dynamics and their centers of mass stop further from each other than their initial position. At finite interactions, integrability is broken, the two spin-components oscillate and mix, with their center-of-mass positions converging very slowly to the center of mass of the whole system. This is a signature that the final localized state is a fully spin-mixed thermalized state. |
| title | Spin-charge separation in the quantum boomerang effect |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2403.16923 |