The statement that this can be implemented with a quantum algorithm is a bit ambiguous. If you look in detail, the problem is only formulated on the quantum com

The statement that this can be implemented with a quantum algorithm is a bit ambiguous. If you look in detail, the problem is only formulated on the quantum computer while the optimization routine which essential solves the problem is left to a classical computer. There are some notions of quantum gradients. But I wouldn’t know how it applies to such problems