TWA versus semiclassical unitary approximation for spin-like systems
We analyze the stable and unstable evolution of spin-like systems in the framework of the Truncated Wigner and Unitary Approximations, and test the dependence of the time scale where the classical evolution determines the dynamics of a quantum system on the semiclassical parameter. •Semiclassical un...
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Veröffentlicht in: | Annals of physics 2017-08, Vol.383, p.620-634 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | We analyze the stable and unstable evolution of spin-like systems in the framework of the Truncated Wigner and Unitary Approximations, and test the dependence of the time scale where the classical evolution determines the dynamics of a quantum system on the semiclassical parameter.
•Semiclassical unitary approach (SUA) is applied for analysis of large-spin dynamics.•Stable and unstable evolution of spin systems in the semiclassical limit is discussed.•A comparative analysis of SUA and Truncated Wigner Approximation is performed. |
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ISSN: | 0003-4916 1096-035X |
DOI: | 10.1016/j.aop.2017.06.006 |