[1] Y. Takahashi, S. Tani, “Power of uninitialized qubits in shallow quantum circuits,” in Proc. 35th Symposium on Theoretical Aspects of Computer Science (STACS 2018), pp. 57:1-57:13, 2018. [2] Y. Takahashi, S. Tani, “Power of uninitialized qubits in shallow quantum circuits,” arXiv:1608.07020v3.