On half-adders based on fusion of signal carriers: Excitation, fluidics, and electricity

Adamatzky, A. (2016) On half-adders based on fusion of signal carriers: Excitation, fluidics, and electricity. Complex Systems, 25 (3). ISSN 0891-2513 Available from: http://eprints.uwe.ac.uk/30715

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Likely outcomes of a collision between two objects are annihilation, reflection or fusion. We show how to construct a one-bit adder with pattern that fuse on impact. A fusion gate has two inputs and three outputs. When a signal is generated on a single input the object propagates along its own output trajectory. When both inputs are active the objects collide at a junction of input trajectories, fuse and propagate along dedicated output trajectory. Thus two outputs produce conjunction of one signal with negation of another signal; and, third output produces conjunction of input signals. By merging two outputs in one we make a one-bit half adder: one output is the conjunction of input signals, another output is the exclusive disjunction of the signals. We discuss blue-prints of the half-adders realised with two types of physical signal careers --- wave-fragments in excitable medium and high-velocity jet streams. We also propose an electrical circuits analogous of a fusion half-adder. By running fusion half-adders in reverse we find that, despite realising the same functions when in a straight mode, all devices implement different functions when their inputs swapped with outputs.

Item Type:Article
Uncontrolled Keywords:half-adders, fusion, signal, carriers, excitation, fluidics, electricity
Faculty/Department:Faculty of Environment and Technology > Department of Computer Science and Creative Technologies
ID Code:30715
Deposited By: Professor A. Adamatzky
Deposited On:13 Jan 2017 12:19
Last Modified:29 Jun 2017 22:28

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