Same as QNC, but logarithmic depth instead of polylogarithmic depth.
At one point, this wiki incorrectly said that it was QNC but with exact answers instead of bounded error; this was probably someone's confusion with classes like QCMA1 vs QCMA and QMA1 vs QMA. In theory this could be QNC1, but such a class does not seem to appear in the literature (yet)!
In contrast to NC1, it is not clear how to simulate QNC1 on a quantum computer in which one qubit is initialized to a pure state, and the remaining qubits are in the maximally mixed state [ASV00].
See also [MN02].
No class.