Abstract
We formulate the superposition principle of two states of qubit as a nonlinear addition rule of mean values of spin projections onto three perpendicular directions and obtain explicit expressions for the mean values determining the superposition states in terms of the mean values of two initial pure states of the qubit.
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Fedorov, A.Y., Man’ko, V.I. Superposition Principle for Qubit States in the Spin-Projection Mean Representation. J Russ Laser Res 43, 82–89 (2022). https://doi.org/10.1007/s10946-022-10025-6
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DOI: https://doi.org/10.1007/s10946-022-10025-6