Physical constraints on magnetic quantum cellular automata

Parish, M.C.B.; Forshaw, M.
September 2003
Applied Physics Letters;9/8/2003, Vol. 83 Issue 10, p2046
Academic Journal
A magnetic cellular computing structure called the bistable magnetic quantum cellular automata (BMQCA) has been investigated using micromagnetic simulations. The time evolution of a number of BMQCA elements and subcircuits was investigated using real-time quantification of the Monte Carlo step. It was found to be essential to include temperature-dependent effects, which were modeled using the Metropolis algorithm. The effects of varying ten different parameters were examined, and it was found that, although individual elements might reliably operate at gigahertz frequencies, the need for adiabatic evolution of the circuit significantly reduces the system speed. This result may have implications for other adiabatic computing systems such as electronic quantum cellular automata and other magnetic logic systems. © 2003 American Institute of Physics.


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