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Contracting the Wigner kernel of a spin to the Wigner kernel of a particle

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Publication details

JournalPhysical Review A
DatePublished - Jan 2001
Issue number1
Pages (from-to)art no. 012102
Original languageEnglish


A general relation between the Moyal formalisms for a spin and a particle is established. Once the formalism has been set up for a spin, the phase-space description of a particle is obtained from contracting the group of rotations to the oscillator group. In this process, turn into a spin Wigner kernel turns into the Wigner kernel of a particle. In fact, only one out of 22s different possible kernels for a spin shows this behavior.

Bibliographical note

© 2001 The American Physical Society. Reproduced in accordance with the publisher's self-archiving policy.

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