Quantum computation with devices whose contents are never read

  • Authors:

  • Abuzer Yakaryilmaz;Rūsiņš Freivalds;A. C. Cem Say;Ruben Agadzanyan

  • Affiliations:

  • Boğaziçi University, Department of Computer Engineering, İstanbul, Turkey;Institute of Mathematics and Computer Science, University of Latvia, Riga, Latvia;Boğaziçi University, Department of Computer Engineering, İstanbul, Turkey;Institute of Mathematics and Computer Science, University of Latvia, Riga, Latvia

  • Venue:
  • UC'10 Proceedings of the 9th international conference on Unconventional computation
  • Year:
  • 2010

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Abstract

In classical computation, a "write-only memory" (WOM) is little more than an oxymoron, and the addition of a WOM to a (deterministic or probabilistic) classical computer brings no advantage. We demonstrate a setup where a quantum computer using a WOM can solve problems that neither a classical computer with a WOM nor a quantum computer without a WOM can solve, when all other resource bounds are equal. We also show that resource-bounded quantum reductions among computational problems are more powerful than their classical counterparts.