Coherent-state optical qudit cluster state generation and teleportation via homodyne detection

Jaewan Kim, Juhui Lee, Se Wan Ji, Hyunchul Nha, Petr M. Anisimov, Jonathan P. Dowling

Research output: Contribution to journalArticle

17 Citations (Scopus)


Defining a computational basis of pseudo-number states, we interpret a coherent state of large amplitude, |α|d/2π, as a qudit - a d-level quantum system - that is an even (meaning same size of amplitudes) superposition of d pseudo-number basis states. A pair of such coherent-state qudits can be maximally entangled by generalized Controlled-Z operation that is based on cross-Kerr nonlinearity, which can be weak for large d. Hence, a coherent-state optical qudit cluster state can be prepared by repetitive application of the generalized Controlled-Z operation to a set of coherent states. We thus propose an optical qudit teleportation as a simple demonstration of cluster state quantum computation.

Original languageEnglish
Pages (from-to)79-82
Number of pages4
JournalOptics Communications
Publication statusPublished - 15 Feb 2015



  • Cluster state
  • Cross-Kerr
  • Qudit
  • Teleportation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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