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Quantum complementarity of microcavity polaritons

Salvatore Savasta·Omar Di Stefano·Vincenzo Savona·Wolfgang Langbein
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Abstract

We present an experiment that probes polariton quantum correlations by exploiting quantum complementarity. Specifically, we find that polaritons in two distinct idler-modes interfere if and only if they share the same signal-mode so that "which-way" information cannot be gathered. The experimental results prove the existence of polariton pair correlations that store the "which-way" information. This interpretation is confirmed by a theoretical analysis of the measured interference visibility in terms of quantum Langevin equations.

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Salvatore Savasta, Omar Di Stefano, Vincenzo Savona, Wolfgang Langbein. 2005-03-22. Quantum complementarity of microcavity polaritons. https://doi.org/10.1103/physrevlett.94.246401

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