Experimental Activation of Bound Entanglement

Fumihiro Kaneda, Ryosuke Shimizu, Satoshi Ishizaka, Yasuyoshi Mitsumori, Hideo Kosaka, and Keiichi Edamatsu
Phys. Rev. Lett. 109, 040501 – Published 26 July 2012
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Abstract

Entanglement is one of the essential resources in quantum information and communication technology (QICT). The entanglement thus far explored and applied to QICT has been pure and distillable entanglement. Yet, there is another type of entanglement, called “bound entanglement,” which is not distillable by local operations and classical communication. We demonstrate the experimental “activation” of the bound entanglement held in the four-qubit Smolin state, unleashing its immanent entanglement in distillable form, with the help of auxiliary two-qubit entanglement and local operations and classical communication. We anticipate that it opens the way to a new class of QICT applications that utilize more general classes of entanglement than ever, including bound entanglement.

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  • Received 29 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.109.040501

© 2012 American Physical Society

Authors & Affiliations

Fumihiro Kaneda1, Ryosuke Shimizu1,2, Satoshi Ishizaka3, Yasuyoshi Mitsumori1, Hideo Kosaka1, and Keiichi Edamatsu1

  • 1Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
  • 2Center for Frontier Science and Engineering, University of Electro-Communications, Tokyo 182-8585, Japan
  • 3Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521, Japan

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Issue

Vol. 109, Iss. 4 — 27 July 2012

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