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Spin measurement retrodiction revisited

Steffen Metzger
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Abstract

The retrodiction of spin measurements along a set of different axes is revisited in detail. The problem is presented in two different pictures, a geometric and a general algebraic one. Explicit measurement operators that allow the retrodiction are given for the case of three and four axes. For the Vaidman-Aharanov-Albert case of three orthogonal axes the quantum network is constructed for two different initial Bell states.

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Steffen Metzger. 2001-02-04. Spin measurement retrodiction revisited. https://arxiv.org/abs/quant-ph/0006115

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