Quantum theory, Quantum computers -- Testing
Recent research in multi-valued logic for quantum computing has shown practical advantages for scaling up a quantum computer. [1,12] Multivalued quantum systems have also been used in the framework of quantum cryptography,  and the concept of a qudit cluster state has been proposed by generalizing the qubit cluster state.  An evolutionary algorithm based synthesizer for ternary quantum circuits has recently been presented,  as well as a synthesis method based on matrix factorization .In this paper, a recursive synthesis method for ternary quantum circuits based on the Cosine-Sine unitary matrix decomposition is presented.
Perkowski, Marek, "Synthesis of Ternary Quantum Logic Circuits by Decomposition" (2005). Electrical and Computer Engineering Faculty Publications and Presentations. 220.