Quantum Cellular Automata from Lattice Field Theories

Details Quantum Cellular Automata from Lattice Field Theories Quantum Cellular Automata from Lattice Field Theories

2003-07-24

arxiv.org/abs/quant-ph/0307176v1

Physics

Quantum Physics

26 pages, 2 figures

Scientific paper

We apply the methods of lattice field theories to the quantization of cellular automata. We discuss the quantization of five main categories of cellular automata: bosonic, fermionic, supersymmetric, spin and quantum dot using path integral and operator formalisms of lattice field theories. We show that the quantization of supersymmetric cellular automata is related to recently discussed string bit models of Thorn and Bergman and represents a link of cellular automata theory to fundamental physics. We discuss spin and quantum dot cellular automata for their importance in experimental realizations and their use in quantum computation. Previous studies of quantum cellular automata utilize the wave function values as cell contents and the discretized linear Dirac equation as an update equation. We show that our approach to the quantization of fermionic cellular automata includes this utilization as a field equation, and in addition allows for nonlinearity through lattice field interactions.

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