Matt Fishman

Amazing, thanks!

By which kind of decomposition, do you mean using positive QR vs. polar in Eq. (22)? Did you find one worked better than the other? I just started to test...

That's interesting. I also remember having some finicky details like that when I was trying to impose reflection symmetry (explicitly imposing `AR = AL^T`), in which case one or the...

@LHerviou regarding how any rewrites going on in core ITensor packages may affect this package, see my comment: https://github.com/ITensor/ITensorInfiniteMPS.jl/issues/87#issuecomment-2371431068.

See discussion in #69 for some context about the subspace expansion methods that are currently used and what their limitations are, as well as work on making better error messages...

For context, currently we use the 2-site subspace expansion method proposed in Appendix B of https://arxiv.org/abs/1701.07035. @mingruyang, as you are well aware (https://arxiv.org/abs/2005.06104) an approach based on 2-site variations has...

@mingruyang, here's a little hack I just thought of: what about first turning on a small nearest neighbor term in the Hamiltonian and then turning it off once you reach...

Unfortunately we don't have iTEBD implemented right now, but that would be pretty easy to implement and then we could use iTEBD and apply a shallow random unitary circuit to...

> Matt, thanks for your explanation. To use the hack you mentioned, then I need to first extend the local Hilbert space of the even sites from Heisenberg (dim 2)...

Gotcha, thanks for the explanation. That makes sense that you can't expand the particle number sectors by adding couplings between the even and odd sites (I hadn't looked carefully at...