Circuit tester

Module to simulate the quantum circuit generated by the compiler,

with noisy gates using quantum trajectories and qmathcatea

class vulqano.circuit_tester.ContinuosOperations(id_infidelity, weights_dict, infidelity_method='gaussian', cross_talk='gaussian')

Class to handle the discrete oprations of a given simulation

Arguments

id_infidelity: float

What should be the infidelity of an identity, i.e. of an idle qubit. It is used as scale for the infidelity of all the other operations, which are defined as id_infidelity*weights_dict[“operation”].

weights_dict: Dictionary[(str, float)]

Dictionary with the infidelity weight of each operation.

infidelity_methodstr | callable, optional

Way to implement the infidelity of the gate. If str, you have to choose from the available methods: - “gaussian”, add gaussian noise to the matrix - “gaussian_on_params”, add gaussian noise to the gate parameters If callable, it should be a function that takes in input the gate name and gate parameters and returns the gate matrix with the error.

cross_talkstr | callable

Crosstalk model. - If “gaussian”, use gaussian noise on the four-qubits gate If callable, it should be a function that takes in input the gate name (with the xtalk configuration) and returns the gate matrix with the error. Default to None.

class vulqano.circuit_tester.DiscreteOperations(id_infidelity, weights_dict, infidelity_method='gaussian', cross_talk='gaussian')

Class to handle the discrete oprations of a given simulation

Arguments

id_infidelity: float

What should be the infidelity of an identity, i.e. of an idle qubit. It is used as scale for the infidelity of all the other operations, which are defined as id_infidelity*weights_dict[“operation”].

weights_dict: Dictionary[(str, float)]

Dictionary with the infidelity weight of each operation.

infidelity_methodstr | callable, optional

Way to implement the infidelity of the gate. If str, you have to choose from the available methods: - “gaussian”, add gaussian noise If callable, it should be a function that takes in input the gate name and returns the gate matrix with the error.

cross_talkstr | callable

Crosstalk model. - If “gaussian”, use gaussian noise on the four-qubits gate If callable, it should be a function that takes in input the gate name (with the xtalk configuration) and returns the gate matrix with the error. Default to None.

property operations

Property giving a list of the available operations

vulqano.circuit_tester.qmatchatea_simulation(filename, operations, conv_params, num_trajectories=1000, backend=qmatchatea.QCBackend, tensor_backend=qtealeaves.tensors.TensorBackend, initialize='random_basis')

Run several simulations of a qasm file named filename using quantum matcha tea starting from random basis states for num_trajectories times. It computes the fidelity |<psi|U U°|psi>|^2 with U being the noiseless version of U°, and |psi> a random state at a given bond dimension

Arguments

filenamestr

Name of the qasm file containing the circuit to run

operationsDiscreteOperations

The operations available in the circuit

num_trajectories: int, optional

Number of trajectories

Returns

np.ndarray[float]

The numpy array of the fidelities

np.ndarray[float]

The numpy array of the infidelities from tensor network truncation

vulqano.circuit_tester.read_qasm_function(filename, operations)

Read a qasm file and build a Qcircuit object for the qmatchatea simulation. Works only when a single register is there.

Arguments

filename: str

Filename of the qasm file to read

operations: DiscreteOperations

Operations class to handle the noise

Returns

Qcircuit

A Quantum circuit class to run with qmatchatea representing a single trajectory