Hi,
I wanted to ask about how to initialize vumps with a random state or even a superposition of states, I haven’t found any documentation for this. In the simple examples I have tried the ground state and its energy greatly depends on the initial conditions even when I disabled conserving quantum numbers. Also is there a simple built-in way of implementing noise in VUMPS? because this also can solve the problem. Thanks!
I don’t think we support that right now but you can always build a state yourself by constructing tensors, setting elements, etc.