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Estimating entanglement of unknown states

Daniel Cavalcanti·Marcelo O. Terra Cunha
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Abstract

The experimental determination of entanglement is a major goal in the quantum information field. In general the knowledge of the state is required in order to quantify its entanglement. Here we express a lower bound to the robustness of entanglement of a state based only on the measurement of the energy observable and on the calculation of a separability energy. This allows the estimation of entanglement dismissing the knowledge of the state in question.

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Daniel Cavalcanti, Marcelo O. Terra Cunha. 2006-08-18. Estimating entanglement of unknown states. https://doi.org/10.1063/1.2337535

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