Why reversible logic

As the basic elements of any logic circuit, logic gates are used to realize Boolean functions. By combining reversible logic gates, reversible circuits can perform complex logical and arithmetic operations. A one-to-one mapping between inputs and outputs is realized. The logical operations run backwards by cascading a reversible logic gate with its dual inverse. Reversible circuits are also called lossless circuits, as there is neither energy loss nor information loss.

These circuits are very attractive for applications where extremely low power consumption, or heat dissipation, is desirable in areas ranging from communications, low power VLSI very large-scale integration technology, optical computing to nanotechnology.

Reversible logic found to be very useful in quantum computing where the quantum evolution is inherently reversible. Article :. Date of Publication: 14 March Fredkin E, Toffoli T Conservative logic. Int J Theor Phys 21 3 — Fujita M a Automatic identification of assertions and invariants with small numbers of test vectors.

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