119 citations · 1.1k across the 47 of their papers we have counts for
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The Wigner Kernel of a Particle obtained from the Wigner Kernel of a Spin by Group Theoretical Contraction
Jean-Pierre Amiet, Stefan Weigert
The Moyal formalism for a particle can be derived from the Moyal formalism for a spin. This is done by contracting the group of rotations to the oscillator group. A new derivation…
Contracting the Wigner-Kernel of a Spin to the Wigner-Kernel of a Particle
Jean-Pierre Amiet, Stefan Weigert
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 i…
Discrete Moyal-type Representations for a Spin
Stephan Heiss, Stefan Weigert
In Moyal's formulation of quantum mechanics, a quantum spin s is described in terms of continuous symbols, i.e. by smooth functions on a two-dimensional sphere. Such prescriptions…
Quantum Diagonalization of Hermitean Matrices
Stefan Weigert
To measure an observable of a quantum mechanical system leaves it in one of its eigenstates and the result of the measurement is one of its eigenvalues. This process is shown to be…