quara.interface.qutip.api module

estimate_standard_povmt_from_qutip(mode_system, num_system, tester_states, num_outcomes, empi_dists, estimator_name, schedules)[source]

Calculates estimate variables and returns an estimate of a quantum state by executing POVM tomography using tester states and empirical distributions.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • tester_states (List[Qobj]) – testers of POVMT.

  • num_outcomes (int) – number of outcome values of the POVM that will be estimated.

  • empi_dists (List[Tuple[int, np.ndarray]]) – empirical distributions to calculate estimates of variables.

  • estimator_name (str) – “linear” or “least_squares”.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

Returns

estimated result of the POVM.

Return type

Qobj

Raises

ValueError – estimator_name is invalid.

estimate_standard_qpt_from_qutip(mode_system, num_system, tester_states, tester_povms, empi_dists, estimator_name, schedules)[source]

Calculates estimate variables and returns an estimate of a quantum gate by executing quantum process tomography using tester states, tester POVMs and empirical distributions.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • tester_states (List[Qobj]) – tester states of QPT.

  • tester_povms (List[List[Qobj]]) – tester POVMs of QPT.

  • empi_dists (List[Tuple[int, np.ndarray]]) – empirical distributions to calculate estimates of variables.

  • estimator_name (str) – “linear” or “least_squares”.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

Returns

estimated result of the quantum gate in super representation.

Return type

Qobj

Raises

ValueError – estimator_name is invalid.

estimate_standard_qst_from_qutip(mode_system, num_system, tester_povms, empi_dists, estimator_name, schedules)[source]

Calculates estimate variables and returns an estimate of a quantum state by executing quantum state tomography using tester POVMs and empirical distributions.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • tester_povms (List[List[Qobj]]) – testers of QST.

  • empi_dists (List[Tuple[int, np.ndarray]]) – empirical distributions to calculate estimates of variables.

  • estimator_name (str) – “linear” or “least_squares”.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

Returns

estimated result of the quantum state.

Return type

Qobj

Raises

ValueError – estimator_name is invalid.

generate_empi_dists_from_qutip_gate(mode_system, num_system, true_gate, tester_states, tester_povms, num_sum, seed, schedules)[source]

Generate empirical distributions using the data generated from probability distribution of specified schedules.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • true_state (Qobj) – true quantum state.

  • tester_states (List[List[Qobj]]) – tester states of QPT.

  • tester_povms (List[List[Qobj]]) – tester POVMs of QPT.

  • num_sum (int) – number of observations per POVM.

  • seed (int) – seed number for generating random number.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

  • true_gate (qutip.qobj.Qobj) –

Returns

Empirical distribution which is a List of empirical probabilities.

Return type

List[Tuple[int, ndarray]]

generate_empi_dists_from_qutip_povm(mode_system, num_system, true_povm, tester_states, num_sum, seed, schedules)[source]

Generate empirical distributions using the data generated from probability distribution of specified schedules.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • true_povm (Qobj) – true POVM.

  • tester_states (List[List[Qobj]]) – testers of POVMT.

  • num_sum (int) – number of observations per state.

  • seed (int) – seed number for generating random number.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

Returns

Empirical distribution which is a List of empirical probabilities.

Return type

List[Tuple[int, ndarray]]

generate_empi_dists_from_qutip_state(mode_system, num_system, true_state, tester_povms, num_sum, seed, schedules)[source]

Generate empirical distributions using the data generated from probability distribution of specified schedules.

Parameters

  • mode_system (str) – “qubit” or “qutrit”

  • num_system (int) – number of qubits or qutrits

  • true_state (Qobj) – true quantum state.

  • tester_povms (List[List[Qobj]]) – testers of QST.

  • num_sum (int) – number of observations per POVM.

  • seed (int) – seed number for generating random number.

  • schedules (Union[List[List[Tuple]], str]) – schedule of the experiment.

Returns

Empirical distribution which is a List of empirical probabilities.

Return type

List[Tuple[int, ndarray]]

least_squares_estimator_wrapper(qtomography, empi_dists, mode_weight)[source]
Parameters
Return type

quara.objects.qoperation.QOperation