Generation and characterization of bound entanglement in optical qubits

Fumihiro Kaneda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


For efficient quantum information processing (QIP), pure and strong entanglement in qubits has been thought to be indispensable. However, it was recently pointed out that bound entangled states, which involve undistillable entanglement between qubits, also have great potential for QIP. In this paper, we report the efficient generation of a four-qubit bound entangled state referred to as the Smolin state using photon polarization qubits. We observed the unlockable bound entanglement which is the specific property of the Smolin state.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalProgress in Informatics
Issue number8
Publication statusPublished - 2011 Mar


  • Entanglement
  • Quantum information
  • Quantum state preparation

ASJC Scopus subject areas

  • Computer Science(all)
  • Library and Information Sciences


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