Decomposing finite Abelian groups

  • Authors:
  • Kevin K. H. Cheung;Michele Mosca

  • Affiliations:
  • Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Ontario, Canada;Department of Combinatorics and Optimization, University of Waterloo, Waterloo, Ontario, Canada

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2001

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Abstract

This paper describes a quantum algorithm for efficiently decomposing finite Abelian groups into a product of cyclic groups. Such a decomposition is needed in order to apply the Abelian hidden subgroup algorithm. Such a decomposition (assuming the Generalized Riemann Hypothesis) also leads to an efficient algorithm for computing class numbers (known to be at least as difficult as factoring).