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Periodic orbit theory including spin degrees of freedom

Brack, Matthias ; Amann, Christian ; Pletyukhov, Mikhail ; Zaitsev, Oleg

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Abstract

We summarize recent developments of the semiclassical description of shell effects in finite fermion systems with explicit inclusion of spin degrees of freedom, in particluar in the presence of spin-orbit interactions. We present a new approach that makes use of spin coherent states and a correspondingly enlarged classical phase space. Taking suitable limits, we can recover some of the earlier approaches. Applications to some model systems are presented.


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