## Abstract

We derive a semiclassical trace formula for quantized chaotic transformations of the torus coupled to a 2-spinor precessing in a magnetic field. The trace formula is applied to semiclassical correlation densities of the quantum map, which, according to the conjecture of Bohigas, Giannoni and Schmit, are expected to converge to those of the circular symplectic ensemble (CSE) of random matrices. In particular, we show that the diagonal approximation of the,spectral form factor for small arguments agrees with the CSE prediction. The results are confirmed by numerical investigations.

Translated title of the contribution | Quantum cat maps with spin^{1}/_{2} |
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Original language | English |

Pages (from-to) | 719 - 738 |

Journal | Nonlinearity |

Volume | 14 (4) |

Publication status | Published - Jul 2001 |

### Bibliographical note

Publisher: IOP publishing LtdOther identifier: IDS number 455ZQ

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