A macroscopic device for quantum computation

Diederik Aerts, Ellie D'Hondt, Bart D'Hooghe, Marek Czachor, Jeroen Dehaene, Bart De Moor

Research output: Contribution to journalArticlepeer-review


We show how a compound system of two entangled qubits in a non-product state can be described in a complete way by extracting entanglement into an internal constraint between the two qubits. By making use of a sphere model representation for the spin 1/2, we derive a geometric model for entanglement. We illustrate our approach on 2-qubit algorithms proposed by Deutsch, respectively Arvind. One of the advantages of the 2-qubit case is that it allows for a nice geometrical representation of entanglement, which contributes to a more intuitive grasp of what is going on in a 2-qubit quantum computation.
Original languageEnglish
Pages (from-to)200-211
Number of pages12
JournalInternational Journal of Theoretical Physics
Issue number1
Publication statusPublished - 2008

Bibliographical note

Accepted for publication in Foundations of Science


  • Quantum computation
  • Entanglement
  • Macroscopic quantum models


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