Graphical reasoning in compact closed categories for quantum computation

  • Authors:
  • Lucas Dixon;Ross Duncan

  • Affiliations:
  • University of Edinburgh, Edinburgh, UK;University of Oxford, Oxford, UK

  • Venue:
  • Annals of Mathematics and Artificial Intelligence
  • Year:
  • 2009

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Abstract

Compact closed categories provide a foundational formalism for a variety of important domains, including quantum computation. These categories have a natural visualisation as a form of graphs. We present a formalism for equational reasoning about such graphs and develop this into a generic proof system with a fixed logical kernel for reasoning about compact closed categories. A salient feature of our system is that it provides a formal and declarative account of derived results that can include `ellipses'-style notation. We illustrate the framework by instantiating it for a graphical language of quantum computation and show how this can be used to perform symbolic computation.