Issues

• gauge-invariant SVD VJP for complex truncated matrices in JAX

  jcmgray/quimb#396 · Filter by author Alekkk777 opened on Jul 3, 2026

• [MERA] How to run MERA on torch backend?

  jcmgray/quimb#390 · Filter by author brian-dellabetta opened on Jun 25, 2026

• NaN in gradient

  jcmgray/quimb#355 · Filter by author lamthuy opened on Apr 1, 2026
  1

• 15 tests fail in the latest release for me

  bug
  jcmgray/quimb#354 · Filter by author iyanmv opened on Mar 23, 2026

• Recommended way of calculating the expectation value at the end of a circuit

  jcmgray/quimb#334 · Filter by author BrunoLiegiBastonLiegi opened on Sep 24, 2025

• Fatal Python error: Segmentation fault

  bug
  jcmgray/quimb#326 · Filter by author HomoY opened on Aug 13, 2025
  1

• ImportError: autoray couldn't find function 'tensordot' for backend 'quimb' when building parametrized CircuitMPS

  jcmgray/quimb#324 · Filter by author ermalrrapaj opened on Aug 1, 2025
  1

• DMRG Convergence and Overlap with True Ground State

  jcmgray/quimb#320 · Filter by author fqian5 opened on Jul 21, 2025
  2

• Gating with hyperindices fails

  bug
  jcmgray/quimb#319 · Filter by author projekter opened on Jul 18, 2025
  1

• tensor_network_apply_op_op and tensor_network_apply_op_vec methods in the arbgeom module are broken.

  bug
  jcmgray/quimb#318 · Filter by author AndrewArrasmith opened on Jul 15, 2025
  1

• Quimb circuit based Trotterization vs TEBD in-built - result mismatch

  jcmgray/quimb#316 · Filter by author sajjan02purdue opened on Jul 7, 2025
  1

• .H property on MPO performs only complex conjugation, not full Hermitian conjugate (dagger)

  jcmgray/quimb#315 · Filter by author marcomaronese opened on Jun 30, 2025
  1

• Ground State Energy Calculation Issues with LocalHam1D

  jcmgray/quimb#311 · Filter by author marcomaronese opened on Jun 13, 2025
  3

• MPS shape conventions mismatch between MPS_computational_state and DMRG

  jcmgray/quimb#304 · Filter by author thibxlv opened on May 26, 2025
  2

• TypeError in cotengra's _build_expression due to inplace kwarg when using TensorNetwork.contract_ind

  bug
  jcmgray/quimb#303 · Filter by author sandner-art opened on May 22, 2025
  2

• Cannot compress disconnected MatrixProductOperator

  bug
  jcmgray/quimb#294 · Filter by author garrison opened on May 7, 2025
  3

• Excited states with DMRG and TEBD with non-local hamiltonian

  jcmgray/quimb#291 · Filter by author sajjan02purdue opened on May 1, 2025
  2

• DMRG with jax or torch

  jcmgray/quimb#290 · Filter by author yuxuanzhang1995 opened on Apr 25, 2025
  1

• tensor-circuit.ipynb sometimes gives ValueError: Term 'cb' does not match shape (2, 2, 2).

  bug
  jcmgray/quimb#280 · Filter by author kevinsung opened on Feb 13, 2025

• Qiskit gates

  enhancement
  jcmgray/quimb#270 · Filter by author kevinsung opened on Dec 6, 2024
  1

• Structured contraction with hyperindices does not pass output_inds along

  bug
  jcmgray/quimb#269 · Filter by author projekter opened on Nov 26, 2024
  1

• Issue when optimizing a quimb quantum circuit through tensorflow.

  jcmgray/quimb#267 · Filter by author LucasAugustusvd opened on Nov 20, 2024

• Can I perform a time evolution with TEBD for a non-Hermitian Hamiltonian?

  jcmgray/quimb#265 · Filter by author talentkeychen opened on Oct 28, 2024
  1

• Multi index per site MPS

  enhancement
  jcmgray/quimb#262 · Filter by author lslattery11 opened on Sep 19, 2024
  1

• Equality checking for tensor objects

  enhancement
  jcmgray/quimb#252 · Filter by author ACE07-Sev opened on Jul 27, 2024
  5