Hiroshi Shinaoka

Slow DMFT calculations for a 5-orbital system (FeSb2)

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I've created a new issue (following #81 ). What is the local site symmetry of FeSb2? According to the output of dcore_pre, the five orbitals are not degenerate and the...

[ITensors] Support for MPO*MPO contraction by densitymatrix method

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# Description Based on discussions with Miles. This small patch allows contracting an MPO and an MPS with a dangling bond at each site. This is intended to be a...

[NDTensors] Reducing compilation time of dense tensor contraction

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This PR is based on the discussion [here](https://itensor.discourse.group/t/strange-compilation-behavior-for-the-function-mps/391/15). # Description As summarized in the above page, ITensors.jl suffers from a long compilation time when decomposing a tensor into MPS. The...

We should describe in the manual how to set a norm for the sum-rule constraint.

To do

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Let us discuss what should be implemented in SpM in near future. Here are my proposals. 1. Log mesh for real frequency This may be useful in the analytical continuation...

Generalizing fitting algorithm to MPO-MPO multiplication

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Thank you for developing the nice library! I am wondering how to generalize the fitting algorithm to MPO-MPO multiplication. I am slowly understanding the internal structure of this library. This...

Support MPO-(MPS with dangling site indices) contraction

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I made a fresh start after #44 was merged into the main branch. For QTT, we may want to contract an MPO (with two site indices at each vertex) and...

Delay SVD of the transformation matrix in `TauSampling` and `MatsubaraSampling`

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The SVD can be done when the `fit` is called first time.

Julia 1.11 issue

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One error found ``` conditioning: Test Failed at /Users/hiroshi/git/SparseIR.jl/test/sampling.jl:165 Expression: length((SparseIR.SplitSVD(ones(ComplexF64, (6, 8)))).S) < 6 Evaluated: 6 < 6 Stacktrace: [1] macro expansion @ ~/.julia/juliaup/julia-1.11.0+0.aarch64.apple.darwin14/share/julia/stdlib/v1.11/Test/src/Test.jl:679 [inlined] [2] macro expansion @...

[ITensorMPS] [BUG] Default algorithm for adding MPSs leading to large bond dimensions

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Thank you for your efforts in the development. **Description of bug** Adding an MPS with an MPS representing 0 with the default algorithm leads to a larger bond dimension than...