The Hidden Subgroup Problem and Eigenvalue Estimation on a Quantum Computer

  • Authors:
  • Michele Mosca;Artur Ekert

  • Affiliations:
  • -;-

  • Venue:
  • QCQC '98 Selected papers from the First NASA International Conference on Quantum Computing and Quantum Communications
  • Year:
  • 1998

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Abstract

A quantum computer can efficiently find the order of an element in a group, factors of composite integers, discrete logarithms, stabilisers in Abelian groups, and hidden or unknown subgroups of Abelian groups. It is already known how to phrase the first four problems as the estimation of eigenvalues of certain unitary operators. Here we show how the solution to the more general Abelian hidden subgroup problem can also be described and analysed as such. We then point out how certain instances of these problems can be solved with only one control qubit, or flying qubits, instead of entire registers of control qubits.