Measuring Entanglement in a Photonic Embedding Quantum Simulator

J.C. Loredo, M.P. Almeida, R. Di Candia, J.S. Pedernales, J. Casanova, Enrique Solano, A.G. White

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)


Measuring entanglement is a demanding task that usually requires full tomography of a quantum system, involving a number of observables that grows exponentially with the number of parties. Recently, it was suggested that adding a single ancillary qubit would allow for the efficient measurement of concurrence, and indeed any entanglement monotone associated with antilinear operations. Here, we report on the experimental implementation of such a device—an embedding quantum simulator—in photonics, encoding the entangling dynamics of a bipartite system into a tripartite one. We show that bipartite concurrence can be efficiently extracted from the measurement of merely two observables, instead of 15, without full tomographic information.
Original languageEnglish
Number of pages5
JournalPhysical Review Letters
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed


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