When does a physical system compute?

@inproceedings{Horsman2014WhenDA,
  title={When does a physical system compute?},
  author={Clare Horsman and Susan Stepney and Robert C. Wagner and Vivien M. Kendon},
  booktitle={Proceedings. Mathematical, physical, and engineering sciences},
  year={2014}
}
Computing is a high-level process of a physical system. Recent interest in non-standard computing systems, including quantum and biological computers, has brought this physical basis of computing to the forefront. There has been, however, no consensus on how to tell if a given physical system is acting as a computer or not; leading to confusion over novel computational devices, and even claims that every physical event is a computation. In this paper, we introduce a formal framework that can be… CONTINUE READING
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