Abstract
We approach the quantification theory of the wave–particle duality restricting ourselves to a qubit entangled with its environment. We use the notion of the conditional expectation value and conditional variance to provide an alternative derivation of the well-known “strong” inequality for the which-way knowledge and quantum-erasure visibility.
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Peřinová, V., Lukš, A. Quantitative wave–particle duality and sensitivity of phase measurements. J Russ Laser Res 30, 493–498 (2009). https://doi.org/10.1007/s10946-009-9094-x
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DOI: https://doi.org/10.1007/s10946-009-9094-x