Open Systems & Information Dynamics
20 (1), 1350004
Between (classical) reversible computation and quantum computation there exists an intermediate computational world, represented by unitary matrices that have all line sums equal to 1. All of these quantum circuits can be synthesized with the help of merely two building blocks: the NEGATOR and the singly controlled square root of NOT.
Read More: http://www.worldscientific.com/doi/abs/10.1142/S1230161213500042