# TWA versus semiclassical unitary approximation for spin-like systems

## Abstract

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. - Highlights: • 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.

- Authors:

- Publication Date:

- OSTI Identifier:
- 22701524

- Resource Type:
- Journal Article

- Journal Name:
- Annals of Physics

- Additional Journal Information:
- Journal Volume: 383; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-4916

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MATHEMATICAL EVOLUTION; PHASE SPACE; QUANTUM SYSTEMS; SEMICLASSICAL APPROXIMATION; SPIN

### Citation Formats

```
Valtierra, I.F., E-mail: fernando11.valtierra@gmail.com, Romero, J.L., E-mail: jose.romero@cucei.udg.mx, and Klimov, A.B., E-mail: klimov.andrei@gmail.com.
```*TWA versus semiclassical unitary approximation for spin-like systems*. United States: N. p., 2017.
Web. doi:10.1016/J.AOP.2017.06.006.

```
Valtierra, I.F., E-mail: fernando11.valtierra@gmail.com, Romero, J.L., E-mail: jose.romero@cucei.udg.mx, & Klimov, A.B., E-mail: klimov.andrei@gmail.com.
```*TWA versus semiclassical unitary approximation for spin-like systems*. United States. doi:10.1016/J.AOP.2017.06.006.

```
Valtierra, I.F., E-mail: fernando11.valtierra@gmail.com, Romero, J.L., E-mail: jose.romero@cucei.udg.mx, and Klimov, A.B., E-mail: klimov.andrei@gmail.com. Tue .
"TWA versus semiclassical unitary approximation for spin-like systems". United States. doi:10.1016/J.AOP.2017.06.006.
```

```
@article{osti_22701524,
```

title = {TWA versus semiclassical unitary approximation for spin-like systems},

author = {Valtierra, I.F., E-mail: fernando11.valtierra@gmail.com and Romero, J.L., E-mail: jose.romero@cucei.udg.mx and Klimov, A.B., E-mail: klimov.andrei@gmail.com},

abstractNote = {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. - Highlights: • 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 = {10.1016/J.AOP.2017.06.006},

journal = {Annals of Physics},

issn = {0003-4916},

number = ,

volume = 383,

place = {United States},

year = {2017},

month = {8}

}

Other availability

Save to My Library

You must Sign In or Create an Account in order to save documents to your library.