Issues

• Generalize Fulqrum description for general purpose spmv

  documentation
  Qiskit/fulqrum#139 · Filter by author nonhermitian opened on Oct 24, 2026
  

• Allow for going direct from fcidump or pyscf to QubitOperator

  enhancement
  Qiskit/fulqrum#137 · Filter by author nonhermitian opened on Oct 23, 2026 · post-QDC
  

• Cannot build against Boost 1.90+ (dynamic_bitset m_bits access)

  Qiskit/fulqrum#129 · Filter by author garrison opened on Sep 30, 2026
  2

• Remove off-diagonal structure from each term

  enhancement
  Qiskit/fulqrum#120 · Filter by author nonhermitian opened on Sep 15, 2026 · post-QDC
  

• Remove the group attribute for each term struct

  enhancement
  Qiskit/fulqrum#118 · Filter by author nonhermitian opened on Sep 14, 2026 · post-QDC
  

• Set data types for max 2^32 terms in a Hamiltonian

  enhancement
  Qiskit/fulqrum#117 · Filter by author nonhermitian opened on Sep 14, 2026 · post-QDC
  

• Move from arrays of structs to structs of arrays for operators

  enhancement
  Qiskit/fulqrum#105 · Filter by author nonhermitian opened on Aug 21, 2026 · post-QDC
  1

  

• Consider tracking number of out-of-subspace (OOS) column lookups

  enhancement
  Qiskit/fulqrum#98 · Filter by author nonhermitian opened on Aug 4, 2026
  

• Support ruff 0.16

  Qiskit/fulqrum#85 · Filter by author nonhermitian opened on Jul 24, 2026
  

• Handle half-strs mode separately

  Qiskit/fulqrum#76 · Filter by author ashsaki opened on Jul 7, 2026

• Flatten offdiag_group_indices from a vector<vector> everywhere

  Qiskit/fulqrum#73 · Filter by author ashsaki opened on Jul 7, 2026

• Define _matvec in Fulqrum Hamiltonians that inherits from scipy LinearOperator

  Qiskit/fulqrum#69 · Filter by author ashsaki opened on Jul 1, 2026

• Add reduced-density-matrix (RDM) support

  Qiskit/fulqrum#57 · Filter by author ashsaki opened on Jun 17, 2026

• Add S^2 !=0 support to Fulqrum

  Qiskit/fulqrum#56 · Filter by author ashsaki opened on Jun 17, 2026

• add tutorial for open shell system

  Qiskit/fulqrum#48 · Filter by author joannaqw opened on May 19, 2026
  1

• Move Subspace to C++

  Qiskit/fulqrum#33 · Filter by author ashsaki opened on Apr 24, 2026
  

• Standardize dtypes

  enhancement
  Qiskit/fulqrum#27 · Filter by author ashsaki opened on Apr 14, 2026
  3

• Update local testing

  Qiskit/fulqrum#23 · Filter by author ashsaki opened on Apr 14, 2026

• Add test cases to detect any performance regression

  Qiskit/fulqrum#21 · Filter by author ashsaki opened on Apr 13, 2026
  1

• Update docs

  Qiskit/fulqrum#13 · Filter by author ashsaki opened on Mar 20, 2026
  1