v0.3.15

Added

• TAT.py: Add const_blocks for tensor to get the const block which will not check the ownership.
• tetragono: Add __contains__ and __len__ for hamiltonians handle of abstract state.
• bridge: Add support for bridging from TNSP new format.
• tetragono: Stop saving configuration for ergodic sampling method during gradient descent.
• tetragono: Add function to convert sampling lattice back to simple update lattice.
• tetragono: Add support for simple update for long range two body interaction.

Changed

• TAT.hpp: Rename the aliases of the symmetry types, the details are shown in the next item.

• TAT.py: Rename the names of the symmetry types, since the previous naming is not consistent:

  old name	new name
  No	No
  Z2	BoseZ2
  U1	BoseU1
  Fermi	FermiU1
  FemriZ2	FermiU1BoseZ2
  FermiU1	FermiU1BoseU1
  Parity	FermiZ2
  FermiFermi	FermiU1FermiU1

• TAT.py: Use scikit-build-core as build backend. MAKEFLAGS and CMAKEFLAGS are droped. Use scikit-build-core
  environment variable SKBUILD_CMAKE_ARGS to pass arguments to cmake command line when building PyTAT wheel.

• tetragono: Use Lanczos algorithm instead of previous power iteration to optimize exact state. update function for
  exact state does not have the second parameter approximate_energy any more, and ex_update in tetragono shell does
  not have the second parameter either.

• TAT.hpp: Change the default exponential iteration step to 8 from 2, since in practice, it is difficult for
  step=2 to convege to a usable result.

Removed

• tetragono: Remove merging Hamiltonians before simple update automatically.

Fixed

• TAT.py: Fix a bug in loading Symmetry or Edge.
• bridge: Fix several bugs in tnsp bridge, because of the TAT interface changes a lot since the first release of tnsp
  bridge.
• TAT.py Fix wrong arguments number for function __deepcopy__ of tensor.
• TAT.hpp: Fix a bug when reading tensors from text data with ANSI control char mixed.