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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| container_title | Annals of physics |
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| creator | Valtierra, I.F. Romero, J.L. Klimov, A.B. |
| description | 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. |
| doi_str_mv | 10.1016/j.aop.2017.06.006 |
| format | Article |
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| ispartof | Annals of physics, 2017-08, Vol.383, p.620-634 |
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| subjects | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS MATHEMATICAL EVOLUTION PHASE SPACE Phase space representation QUANTUM SYSTEMS SEMICLASSICAL APPROXIMATION Semiclassical methods SPIN Wigner function |
| title | TWA versus semiclassical unitary approximation for spin-like systems |
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