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ffsim 0.0.85.dev0
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ffsim 0.0.85.dev0

This project is part of the Qiskit ecosystem

  • Installation
  • Tutorials
    • Implement Trotter simulation of the double-factorized Hamiltonian
    • Create a variational ansatz
  • Explanations
    • State vectors and gates
    • Hamiltonians
    • Variational ansatzes
    • Orbital rotations
    • Double-factorized representation of the molecular Hamiltonian
    • Diagonal Coulomb Hamiltonians
    • The local unitary cluster Jastrow (LUCJ) ansatz
    • The FermionOperator class
    • Protocols
    • Qubit gate decompositions of fermionic gates
  • How-to guides
    • Sample from state vectors
    • Compute expectation values
    • Simulate the variational quantum eigensolver (VQE)
    • Simulate Trotterized time evolution for the molecular Hamiltonian
    • Simulate Trotterized time evolution for the Fermi-Hubbard model
    • Simulate entanglement forging
    • Sample from Slater determinants
    • Compress an orbital rotation into fewer Givens rotations
    • Build Qiskit circuits for the LUCJ ansatz
    • Build Qiskit circuits for Trotterized Hamiltonian simulation
    • Simulate Hamming weight-preserving Qiskit circuits
    • Merge orbital rotations in Qiskit circuits
  • API reference
    • ffsim
      • ffsim.apply_diag_coulomb_evolution
      • ffsim.apply_fsim_gate
      • ffsim.apply_fswap_gate
      • ffsim.apply_givens_rotation
      • ffsim.apply_hop_gate
      • ffsim.apply_num_interaction
      • ffsim.apply_num_num_interaction
      • ffsim.apply_num_op_prod_interaction
      • ffsim.apply_num_op_sum_evolution
      • ffsim.apply_on_site_interaction
      • ffsim.apply_orbital_rotation
      • ffsim.apply_quad_ham_evolution
      • ffsim.apply_tunneling_interaction
      • ffsim.DiagonalCoulombHamiltonian
      • ffsim.DoubleFactorizedHamiltonian
      • ffsim.MolecularHamiltonian
      • ffsim.MolecularHamiltonianSpinless
      • ffsim.MolecularHamiltonianUnrestricted
      • ffsim.SingleFactorizedHamiltonian
      • ffsim.init_cache
      • ffsim.MolecularData
      • ffsim.FermionAction
      • ffsim.FermionOperator
      • ffsim.ccsd_generator_restricted
      • ffsim.ccsd_generator_unrestricted
      • ffsim.cre
      • ffsim.cre_a
      • ffsim.cre_b
      • ffsim.des
      • ffsim.des_a
      • ffsim.des_b
      • ffsim.doubles_excitations_restricted
      • ffsim.doubles_excitations_unrestricted
      • ffsim.fermi_hubbard_1d
      • ffsim.fermi_hubbard_2d
      • ffsim.number_operator
      • ffsim.s_minus_operator
      • ffsim.s_plus_operator
      • ffsim.s_squared_operator
      • ffsim.s_x_operator
      • ffsim.s_y_operator
      • ffsim.s_z_operator
      • ffsim.singles_excitations_restricted
      • ffsim.singles_excitations_unrestricted
      • ffsim.uccsd_generator_restricted
      • ffsim.uccsd_generator_unrestricted
      • ffsim.SupportsApplyUnitary
      • ffsim.SupportsApproximateEquality
      • ffsim.SupportsDiagonal
      • ffsim.SupportsFermionOperator
      • ffsim.SupportsLinearOperator
      • ffsim.SupportsTrace
      • ffsim.apply_unitary
      • ffsim.approx_eq
      • ffsim.diag
      • ffsim.fermion_operator
      • ffsim.linear_operator
      • ffsim.trace
      • ffsim.BitstringType
      • ffsim.ProductStateSum
      • ffsim.ReducedDensityMatrix
      • ffsim.Spin
      • ffsim.StateVector
      • ffsim.addresses_to_strings
      • ffsim.dim
      • ffsim.dims
      • ffsim.expectation_one_body_power
      • ffsim.expectation_one_body_product
      • ffsim.hartree_fock_state
      • ffsim.rdms
      • ffsim.sample_slater
      • ffsim.sample_state_vector
      • ffsim.slater_determinant
      • ffsim.slater_determinant_amplitudes
      • ffsim.slater_determinant_rdms
      • ffsim.spin_square
      • ffsim.spinful_to_spinless_rdm1
      • ffsim.spinful_to_spinless_rdm2
      • ffsim.spinful_to_spinless_vec
      • ffsim.strings_to_addresses
      • ffsim.simulate_qdrift_double_factorized
      • ffsim.simulate_trotter_diag_coulomb_split_op
      • ffsim.simulate_trotter_double_factorized
      • ffsim.GivensAnsatzOp
      • ffsim.HopGateAnsatzOperator
      • ffsim.NumNumAnsatzOpSpinBalanced
      • ffsim.UCCSDOpRestricted
      • ffsim.UCCSDOpRestrictedReal
      • ffsim.UCCSDOpUnrestricted
      • ffsim.UCCSDOpUnrestrictedReal
      • ffsim.UCJAnglesOpSpinBalanced
      • ffsim.UCJOpSpinBalanced
      • ffsim.UCJOpSpinless
      • ffsim.UCJOpSpinUnbalanced
      • ffsim.multireference_state
      • ffsim.multireference_state_prod
      • ffsim.optimize_orbitals
    • ffsim.contract
      • ffsim.contract.contract_diag_coulomb
      • ffsim.contract.contract_num_op_sum
      • ffsim.contract.contract_one_body
      • ffsim.contract.diag_coulomb_linop
      • ffsim.contract.num_op_sum_linop
      • ffsim.contract.one_body_linop
      • ffsim.contract.two_body_linop
      • ffsim.contract.two_body_linop_unrestricted
    • ffsim.linalg
      • ffsim.linalg.apply_matrix_to_slices
      • ffsim.linalg.double_factorized
      • ffsim.linalg.double_factorized_t2
      • ffsim.linalg.double_factorized_t2_alpha_beta
      • ffsim.linalg.expm_multiply_taylor
      • ffsim.linalg.givens_decomposition
      • ffsim.linalg.givens_decomposition_slater
      • ffsim.linalg.is_antihermitian
      • ffsim.linalg.is_hermitian
      • ffsim.linalg.is_orthogonal
      • ffsim.linalg.is_real_symmetric
      • ffsim.linalg.is_special_orthogonal
      • ffsim.linalg.is_unitary
      • ffsim.linalg.logm_unitary
      • ffsim.linalg.lup
      • ffsim.linalg.match_global_phase
      • ffsim.linalg.modified_cholesky
      • ffsim.linalg.one_hot
      • ffsim.linalg.reduced_matrix
    • ffsim.optimize
      • ffsim.optimize.minimize_linear_method
    • ffsim.qiskit
      • ffsim.qiskit.PRE_INIT
      • ffsim.qiskit.DiagCoulombEvolutionJW
      • ffsim.qiskit.DiagCoulombEvolutionSpinlessJW
      • ffsim.qiskit.DropNegligible
      • ffsim.qiskit.FfsimSampler
      • ffsim.qiskit.GivensAnsatzOpJW
      • ffsim.qiskit.GivensAnsatzOpSpinlessJW
      • ffsim.qiskit.MergeOrbitalRotations
      • ffsim.qiskit.NumNumAnsatzOpSpinBalancedJW
      • ffsim.qiskit.NumOpSumEvolutionJW
      • ffsim.qiskit.NumOpSumEvolutionSpinlessJW
      • ffsim.qiskit.OrbitalRotationJW
      • ffsim.qiskit.OrbitalRotationSpinlessJW
      • ffsim.qiskit.PrepareHartreeFockJW
      • ffsim.qiskit.PrepareHartreeFockSpinlessJW
      • ffsim.qiskit.PrepareSlaterDeterminantJW
      • ffsim.qiskit.PrepareSlaterDeterminantSpinlessJW
      • ffsim.qiskit.SimulateTrotterDiagCoulombSplitOpJW
      • ffsim.qiskit.SimulateTrotterDoubleFactorizedJW
      • ffsim.qiskit.UCJOpSpinBalancedJW
      • ffsim.qiskit.UCJOpSpinUnbalancedJW
      • ffsim.qiskit.UCJOpSpinlessJW
      • ffsim.qiskit.ffsim_vec_to_qiskit_vec
      • ffsim.qiskit.final_state_vector
      • ffsim.qiskit.generate_lucj_pass_manager
      • ffsim.qiskit.jordan_wigner
      • ffsim.qiskit.pre_init_passes
      • ffsim.qiskit.qiskit_vec_to_ffsim_vec
    • ffsim.random
      • ffsim.random.random_antihermitian
      • ffsim.random.random_density_matrix
      • ffsim.random.random_diagonal_coulomb_hamiltonian
      • ffsim.random.random_double_factorized_hamiltonian
      • ffsim.random.random_fermion_hamiltonian
      • ffsim.random.random_fermion_operator
      • ffsim.random.random_givens_ansatz_op
      • ffsim.random.random_hermitian
      • ffsim.random.random_molecular_hamiltonian
      • ffsim.random.random_molecular_hamiltonian_spinless
      • ffsim.random.random_molecular_hamiltonian_unrestricted
      • ffsim.random.random_num_num_ansatz_op_spin_balanced
      • ffsim.random.random_orthogonal
      • ffsim.random.random_real_symmetric_matrix
      • ffsim.random.random_special_orthogonal
      • ffsim.random.random_state_vector
      • ffsim.random.random_t2_amplitudes
      • ffsim.random.random_two_body_tensor
      • ffsim.random.random_uccsd_op_restricted
      • ffsim.random.random_uccsd_op_restricted_real
      • ffsim.random.random_uccsd_op_unrestricted
      • ffsim.random.random_uccsd_op_unrestricted_real
      • ffsim.random.random_ucj_op_spin_balanced
      • ffsim.random.random_ucj_op_spin_unbalanced
      • ffsim.random.random_ucj_op_spinless
      • ffsim.random.random_unitary
    • ffsim.testing
      • ffsim.testing.assert_allclose_up_to_global_phase
      • ffsim.testing.generate_norb_nelec
      • ffsim.testing.generate_norb_nelec_spin
      • ffsim.testing.generate_norb_nocc
      • ffsim.testing.generate_norb_spin
      • ffsim.testing.random_nelec
      • ffsim.testing.random_occupied_orbitals
  • GitHub
  • Developer guide
  • Release notes
  • Development branch docs
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TutorialsΒΆ

  • Implement Trotter simulation of the double-factorized Hamiltonian
  • Create a variational ansatz
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