Key points are not available for this paper at this time.
This paper proposes a new optimized quantum block-ZXZ decomposition method 4, 5, 6 that results in the construction of more optimal quantum circuits than the quantum Shannon decomposition (QSD) 17 can achieve, which has been the most optimal decomposition method since 2006. With the proposed decomposition, a general 3-qubit gate can be decomposed using 19 CNOT gates (rather than 20). For general n-qubit gates, the proposed decomposition generates circuits that have (22/48) 4ⁿ - (3/2) 2ⁿ + (5/3) CNOT gates, which is less that the best known exact decomposition algorithm by (4^n-2 -1) /3 CNOT gates.
Krol et al. (Wed,) studied this question.