Optical binary-matrix synthesis for solving bounded NP-complete combinatorial problems

Natan T. Shaked, Tal Tabib, Gil Simon, Stephane Messika, Shlomi Dolev, Joseph Rosen

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


An optical method for synthesizing a binary matrix representing all feasible solutions of a bounded (input length restricted) NP-complete combinatorial problem is presented. After the preparation of this matrix, an optical matrix-vector multiplier can be used in order to multiply the synthesized binary matrix and a grayscale vector representing the weights of the problem. This yields the required solution vector. The synthesis of the binary matrix is based on an efficient algorithm that utilizes a small number of long-vector duplications. These duplications are performed optically by using an optical correlator. Simulations and experimental results are given.

Original languageEnglish
Article number108201
JournalOptical Engineering
Issue number10
StatePublished - 1 Oct 2007


  • Correlators
  • Fourier optics
  • Matrix multiplication
  • Optical computing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (all)


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