Séminaire du LPTMS: Olivier Giraud


11:00 - 12:00

LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay
15 Rue Georges Clemenceau, Orsay, 91405

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Weinberg representation, coherent and anticoherent spin states

Olivier Giraud (LPTMS)


We introduce a new representation for density matrices of symmetric quantum states in finite-dimensional Hilbert spaces. This representation is particularly suited to the description of spin-j states in terms of linear combinations of spin coherent states. We describe several applications of such a representation: identification of the classical state closest to a given quantum state, construction of anticoherent spin states, classicality and separability criteria.

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