Network implementation of covariant two-qubit quantum operations
Jaroslav Novotný, G. Alber, Igor Jex · Physical Review A · 2007
A six-qubit quantum network consisting of conditional unitary gates is presented which is capable of implementing a large class of covariant two-qubit quantum operations. Optimal covariant NOT operations for one- and two-qubit systems are special cases contained in this class. The design of this quantum network exploits basic algebraic properties which also shed light onto these covariant quantum processes.