Global quench dynamics and the growth of entanglement entropy in disordered spin chains with tunable range interactions
The nonequilibrium dynamics of disordered many-body quantum systems after a quantum quench unveils important insights about the competition between interactions and disorder, yielding, in particular, an interesting perspective toward the understanding of many-body localization. Still, the experiment...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
18 October 2023
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| In: |
Physical review
Year: 2023, Jahrgang: 108, Heft: 14, Pages: 1-5 |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.108.L140203 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.108.L140203 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.108.L140203 
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| Verfasserangaben: | Y. Mohdeb, J. Vahedi, R.N. Bhatt, S. Haas, and S. Kettemann |
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| 245 | 1 | 0 | |a Global quench dynamics and the growth of entanglement entropy in disordered spin chains with tunable range interactions |c Y. Mohdeb, J. Vahedi, R.N. Bhatt, S. Haas, and S. Kettemann |
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| 520 | |a The nonequilibrium dynamics of disordered many-body quantum systems after a quantum quench unveils important insights about the competition between interactions and disorder, yielding, in particular, an interesting perspective toward the understanding of many-body localization. Still, the experimentally relevant effect of bond randomness in long-range interacting spin chains on their dynamical properties have so far not been investigated. In this Letter, we examine the entanglement entropy growth after a global quench in a quantum spin chain with randomly placed spins and long-range tunable interactions decaying with distance with power . Using a dynamical version of the strong disorder renormalization group we find for > that the entanglement entropy grows logarithmically with time and becomes smaller with larger as ()=ln()/(2). Here, =2ln2−1. We present results of numerical exact diagonalization calculations for system sizes up to ∼16 spins, in good agreement with the analytical results for sufficiently large >≈1.8. For <, we find that the entanglement entropy grows as a power law with time, ()∼() with 0<()<1 a decaying function of the interaction exponent . | ||
| 700 | 1 | |a Vahedi, Javad |e VerfasserIn |0 (DE-588)1321230133 |0 (DE-627)1881348237 |4 aut | |
| 700 | 1 | |a Bhatt, R. N. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Haas, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kettemann, S. |e VerfasserIn |4 aut | |
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