L_terms.append(
hcp.generate_arbitary_hamiltonian(num_qubits, [0.5, -0.5j], [
'0' * i + '1' + '0' * (num_qubits - 1 - i),
'0' * i + '2' + '0' * (num_qubits - 1 - i)
]))
#L_terms = [hcp.generate_arbitary_hamiltonian(num_qubits,[1],['30'])]
#L_terms.append(hcp.generate_arbitary_hamiltonian(num_qubits,[0.5,-0.5j],['10','20']))
#L_terms.append(hcp.generate_arbitary_hamiltonian(num_qubits,[1],['03']))
#L_terms.append(hcp.generate_arbitary_hamiltonian(num_qubits,[0.5,-0.5j],['01','02']))
else:
hamiltonian = hcp.generate_arbitary_hamiltonian(
num_qubits, list(pauli_decomp.values()), list(pauli_decomp.keys()))
#print('Beta values are ' + str(hamiltonian.return_betas()))
ansatz = acp.initial_ansatz(num_qubits)
ansatzlist = []
ansatzlist.append(ansatz)
betamatrixlist = []
#Run IQAE
for k in range(1, uptowhatK + 1):
print('##########################################')
print('K = ' + str(k))
#Generate Ansatz for this round
ansatz = acp.gen_next_ansatz(ansatz,
hamiltonian,
num_qubits,
method='random_selection_new',
num_new_to_add=numberofnewstatestoadd)
ansatzlist.append(ansatz)
def big_ass_loop(delta,Gamma,mu, observable_obj_list):
"""
Here, observable_obj_list refers to a list of observable objects
"""
hamiltonian = generate_XXZ_hamiltonian(num_qubits, delta)
gammas, L_terms = generate_nonlocaljump_gamma_and_Lterms(num_qubits,Gamma,mu)
ansatz = acp.initial_ansatz(num_qubits)
#get the steady state using qutip(lol)
qtp_hamiltonian = qutip.Qobj(hamiltonian.to_matrixform())
qtp_Lterms = [qutip.Qobj(i.to_matrixform()) for i in L_terms]
qtp_C_ops = [np.sqrt(gammas[i]) * qtp_Lterms[i] for i in range(len(qtp_Lterms))]
qtp_rho_ss = qutip.steadystate(qtp_hamiltonian, qtp_C_ops,method='iterative-gmres')
#compute the theoretical observable expectation values
observable_matrixforms = [observable.to_matrixform() for observable in observable_obj_list]
theoretical_expectation_values = [np.trace(qtp_rho_ss.full() @ observable_matform) for observable_matform in observable_matrixforms]
#%%
#compute GQAS matrices
fidelity_results = dict()
observable_expectation_results = dict()
for k in range(1, uptowhatK + 1):
print('##########################################')
print('K = ' +str(k))
# max_k_val = k
#Generate Ansatz for this round
if random_selection_new:
ansatz = acp.gen_next_ansatz(ansatz, hamiltonian, num_qubits,method='random_selection_new',num_new_to_add=numberofnewstatestoadd)
else:
ansatz = acp.gen_next_ansatz(ansatz, hamiltonian, num_qubits)
O_matrices_uneval = []
for observable in observable_obj_list:
O_matrix_uneval = mcp.unevaluatedmatrix(num_qubits, ansatz, observable, "O")
O_matrices_uneval.append(O_matrix_uneval)
E_mat_uneval = mcp.unevaluatedmatrix(num_qubits, ansatz, hamiltonian, "E")
D_mat_uneval = mcp.unevaluatedmatrix(num_qubits, ansatz, hamiltonian, "D")
if optimizer == 'feasibility_sdp':
R_mats_uneval = []
F_mats_uneval = []
for thisL in L_terms:
R_mats_uneval.append(mcp.unevaluatedmatrix(num_qubits,ansatz,thisL,"D"))
thisLdagL = hcp.multiply_hamiltonians(hcp.dagger_hamiltonian(thisL),thisL)
F_mats_uneval.append(mcp.unevaluatedmatrix(num_qubits,ansatz,thisLdagL,"D"))
#Here is where we should be able to specify how to evaluate the matrices.
#However only the exact method (classical matrix multiplication) has been
#implemented so far
if use_qiskit:
E_mat_evaluated = E_mat_uneval.evaluate_matrix_with_qiskit_circuits(expectation_calculator)
D_mat_evaluated = D_mat_uneval.evaluate_matrix_with_qiskit_circuits(expectation_calculator)
O_matrices_evaluated = [i.evaluate_matrix_with_qiskit_circuits(expectation_calculator) for i in O_matrices_uneval]
else:
E_mat_evaluated = E_mat_uneval.evaluate_matrix_by_matrix_multiplicaton(initial_state)
D_mat_evaluated = D_mat_uneval.evaluate_matrix_by_matrix_multiplicaton(initial_state)
O_matrices_evaluated = [i.evaluate_matrix_by_matrix_multiplicaton(initial_state) for i in O_matrices_uneval]
if optimizer == 'feasibility_sdp':
R_mats_evaluated = []
for r in R_mats_uneval:
if use_qiskit:
R_mats_evaluated.append(r.evaluate_matrix_with_qiskit_circuits(expectation_calculator))
else:
R_mats_evaluated.append(r.evaluate_matrix_by_matrix_multiplicaton(initial_state))
F_mats_evaluated = []
for f in F_mats_uneval:
if use_qiskit:
F_mats_evaluated.append(f.evaluate_matrix_with_qiskit_circuits(expectation_calculator))
else:
F_mats_evaluated.append(f.evaluate_matrix_by_matrix_multiplicaton(initial_state))
##########################################
#Start of the classical post-processing. #
##########################################
if optimizer == 'feasibility_sdp':
IQAE_instance = pp.IQAE_Lindblad(num_qubits, D_mat_evaluated, E_mat_evaluated,R_matrices = R_mats_evaluated,F_matrices = F_mats_evaluated,gammas = gammas)
else:
IQAE_instance = pp.IQAE_Lindblad(num_qubits, D_mat_evaluated, E_mat_evaluated)
IQAE_instance.define_optimizer(optimizer, eigh_invcond=eigh_inv_cond,eig_invcond=eig_inv_cond,degeneracy_tol=degeneracy_tol,sdp_tolerance_bound=sdp_tolerance_bound)
IQAE_instance.evaluate()
# IQAE_instance.evaluate(kh_test=False)
#all_energies,all_states = IQAE_instance.get_results_all()
result_dictionary = pp.analyze_density_matrix(num_qubits,initial_state,IQAE_instance,E_mat_evaluated,ansatz,hamiltonian,gammas,L_terms,qtp_rho_ss,O_matrices_evaluated)
observable_expectation_results[k] = result_dictionary['observable_expectation']
fidelity_results[k] = result_dictionary['fidelity']
#if round(fidelity, 6) == 1:
# print("breaking loop as fidelity = 1 already")
# #raise(RuntimeError("Fidelity = 1!"))
# break
#print('JON: Got %s results'%len(fidelity_results))
return (observable_expectation_results, theoretical_expectation_values, fidelity_results)