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TensorKit v0.15 changes#102

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VictorVanthilt wants to merge 10 commits intomasterfrom
vv-TensorKit-0.15
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TensorKit v0.15 changes#102
VictorVanthilt wants to merge 10 commits intomasterfrom
vv-TensorKit-0.15

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@VictorVanthilt
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TensorKit v0.15 has some breaking changes for the interface of factorizations. Additionally, a truncated hermitian eigenvalue decomposition eigh_trunc has been added, which will speed up our HOTRG code.

@Yue-Zhengyuan
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A significant omission in TensorKit 0.15.0 (which originated from the underlying MatrixAlgebraKit) is that they forget to return the truncation errors (QuantumKitHub/MatrixAlgebraKit.jl#72), which is required by HOTRG to decide which projector is to be used. We need to wait until that is fixed.

@VictorVanthilt
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Once QuantumKitHub/TensorKit.jl#312 is merged and released, we can go ahead and start using the newest TensorKit here.

@VictorVanthilt
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Ok so everything is working except getting the truncation error from eigh_trunc in HOTRG.
Parking this PR until we're able to get this.

@Yue-Zhengyuan
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Guess we need to directly jump to 0.16 now

@VictorVanthilt VictorVanthilt deleted the vv-TensorKit-0.15 branch March 20, 2026 13:44
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