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Monogamy - Why Alice and Bob don't get out enough

Alastair Kay ( Mathematical Institute, University of Oxford and Centre for Quantum Technologies, National University of Singapore )

In scenarios such as cryptography, Alice and Bob, the ubiquitous players of quantum games, derive special benefits from the monogamous relationship of quantum correlations. In this talk, I will argue that it is also at the root of why the macroscopic world of our daily experience does not require a description based on probability amplitudes i.e. how local realism emerges out of quantum mechanics, which is fundamentally not local realistic. If time permits, I will also illustrate the relation between the monogamy of quantum correlations and the ability to clone an unknown quantum state.



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