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Geometric Phase Transition: direct measurement of a mathematical abstraction

Daniel Cavalcanti, Fernando G. S. L. Brandao, Marcelo O. Terra Cunha

quant-pharXiv:quant-ph/0510068

Abstract

By viewing entanglement as a state function, a new kind of phase transition takes place: the geometric phase transition. This phenomenon occurs due to singularities in the shape of the entangled states set. It is shown how this result can be carried to provide a better understanding of the geometry of entanglement. Surprisingly, this study can be done experimentally, what allows to determine the shape of different entangled states sets, a purely mathematical definition, in real experiments.

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