Proceedings of IEEE 36th Annual Foundations of Computer Science (1995)

Milwaukee, Wisconsin

Oct. 23, 1995 to Oct. 25, 1995

ISSN: 0272-5428

ISBN: 0-8186-7183-1

pp: 528

J. Watrous , Dept. of Comput. Sci., Wisconsin Univ., Madison, WI, USA

ABSTRACT

Since Richard Feynman introduced the notion of quantum computation in 1982, various models of "quantum computers" have been proposed (R. Feynman, 1992). These models include quantum Turing machines and quantum circuits. We define another quantum computational model, one dimensional quantum cellular automata, and demonstrate that any quantum Turing machine can be efficiently simulated by a one dimensional quantum cellular automaton with constant slowdown. This can be accomplished by consideration of a restricted class of one dimensional quantum cellular automata called one dimensional partitioned quantum cellular automata. We also show that any one dimensional partitioned quantum cellular automaton can be simulated by a quantum Turing machine with linear slowdown, but the problem of efficiently simulating an arbitrary one dimensional quantum cellular automaton with a quantum Turing machine is left open. From this discussion, some interesting facts concerning these models are easily deduced.

INDEX TERMS

quantum theory; cellular automata; Turing machines; simulation; physics computing; physics; one-dimensional quantum cellular automata; quantum computation; quantum computers; quantum computational model; one dimensional quantum cellular automata; quantum Turing machine; constant slowdown; one dimensional partitioned quantum cellular automata; linear slowdown; 1D partitioned quantum cellular automaton simulation

CITATION

J. Watrous, "On one-dimensional quantum cellular automata,"

*Proceedings of IEEE 36th Annual Foundations of Computer Science(FOCS)*, Milwaukee, Wisconsin, 1995, pp. 528.

doi:10.1109/SFCS.1995.492583

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