mtfishman/itensorqtt.jl

Solve low dimensional partial differential equations with ITensor.

ITensorQTT

itensorqtt.jl's Issues

Update ITensorTDVP compat to 0.0.4

I'm not able to install ITensorQTT currently because I get the following message:

ERROR: Unsatisfiable requirements detected for package ITensorTDVP [25707e16]:
 ITensorTDVP [25707e16] log:
 ├─possible versions are: 0.0.4 or uninstalled
 ├─restricted to versions 0.0.3 by ITensorQTT [574676e4] — no versions left
 │ └─ITensorQTT [574676e4] log:
 │   ├─possible versions are: 0.0.1 or uninstalled
 │   └─ITensorQTT [574676e4] is fixed to version 0.0.1
 └─ITensorTDVP [25707e16] is fixed to version 0.0.4

Add tensor cross interpolation

Add QTT type

Add a QTT type that is a wrapper around an MPS, i.e.:

struct QTT{D} <: AbstractMPS
  mps::MPS
end

The advantage is that it stores the dimensionality of the function D in the type, which is helpful for dispatch and let's us avoid passing around the dimensionality of the function along with the MPS manually like I do now throughout the package. Also, there are many functions in the package that are specialized to QTT but don't make much sense for general MPS so it would be good to have a type to distinguish the two of them.

Add DFT/QFT MPO constructor