تقرير
Semi-Classical Discretization and Long-Time Evolution of Variable Spin Systems
| العنوان: | Semi-Classical Discretization and Long-Time Evolution of Variable Spin Systems |
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| المؤلفون: | Morales-Hernández, Giovani E., Castellanos, Juan C., Romero, José L., Klimov, Andrei B. |
| المصدر: | Entropy 23, no. 6: 684 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | We apply the semi-classical limit of the generalized $SO(3)$ map for representation of variable-spin systems in a four-dimensional symplectic manifold and approximate their evolution terms of effective classical dynamics on $T^{\ast }\mathcal{S}_{2}$. Using the asymptotic form of the star-product, we manage to "quantize" one of the classical dynamic variables and introduce a discretized version of the Truncated Wigner Approximation (TWA). Two emblematic examples of quantum dynamics (rotor in an external field and two coupled spins) are analyzed, and the results of exact, continuous, and discretized versions of TWA are compared. Comment: 19 pages, 3 figures. https://doi.org/10.3390/e23060684 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3390/e23060684 |
| URL الوصول: | http://arxiv.org/abs/2108.09324 |
| رقم الأكسشن: | edsarx.2108.09324 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3390/e23060684 |
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