Publication

Entanglement properties of a measurement-based entanglement distillation experiment

01/04/2019

H Jeng, S Tserkis, JY Haw, HM. Chrzanowski, J Janousek, TC. Ralph, PK Lam, and SM. Assad

Phys. Rev. A, 99, 042304 (2019)

Entanglement properties of a measurement-based entanglement distillation experiment

Measures of entanglement can be employed for the analysis of numerous quantum information protocols. Due to computational convenience, logarithmic negativity is often the choice in the case of continuous-variable systems. In this work, we analyze a continuous-variable measurement-based entanglement distillation experiment using a collection of entanglement measures. This includes logarithmic negativity, entanglement of formation, distillable entanglement, relative entropy of entanglement, and squashed entanglement. By considering the distilled entanglement as a function of the success probability of the distillation protocol, we show that the logarithmic negativity surpasses the bound on deterministic entanglement distribution at a relatively large probability of success. This is in contrast to the other measures which would only be able to do so at much lower probabilities, hence demonstrating that logarithmic negativity alone is inadequate for assessing the performance of the distillation protocol. In addition to this result, we also observed an increase in the distillable entanglement by making use of upper and lower bounds to estimate this quantity. We thus demonstrate the utility of these theoretical tools in an experimental setting.

University: Australian National University, The University of Queensland

Authors Centre Participants: Mr. Spyros Tserkis, Dr. Jiri Janousek, Prof. Tim C Ralph, Dr. Syed M. Assad, Prof. Ping Koy Lam, Mr. Hao Jeng, JY Haw, HM. Chrzanowski

Source: Physical Review A

Publication Type: Refereed Journal article

DOI Link: DOI Link

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