Abstract

We introduce a generalized temporal evolution operator that belongs to a q-deformed Hilbert space. This q-unitary operator is used to revisit a nonlinear form of the Schrödinger equation related to the nonextensive thermostatistical framework through a q-deformed Dirac formalism. We also obtain generalized versions of the density matrix operator, the Liouville-von Neumann equation and the Bloch vector, that can be used in the description of decoherence phenomena. Deformed rotation matrices are used for the problem of the spin 12 precession in a uniform magnetic field.

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