Note

This is the documentation for the current state of the development branch of Qiskit Experiments. The documentation or APIs here can change prior to being released.

SingleTransmonTestBackend

class SingleTransmonTestBackend(qubit_frequency=5000000000.0, anharmonicity=-250000000.0, lambda_1=1000000000.0, lambda_2=800000000.0, gamma_1=10000.0, noise=True, **kwargs)

A backend that corresponds to a three level anharmonic transmon qubit.

The Hamiltonian of the system is

$$H=\hslash \sum _{j=1,2}[{\omega }_j|j⟩⟨j|+\mathcal{E}(t){\lambda }_j({\sigma }_j^{+}+{\sigma }_j^{-})]$$

Here, ${\omega }_j$ is the transition frequency from level :math`0` to level $j$. $\mathcal{E}(t)$ is the drive field and ${\sigma }_j^{\pm }$ are the raising and lowering operators between levels $j-1$ and $j$.

Initialise backend with hamiltonian parameters

Parameters:

• qubit_frequency (float) – Frequency of the qubit (0-1). Defaults to 5e9.

• anharmonicity (float) – Qubit anharmonicity $alpha$ = f12 - f01. Defaults to -0.25e9.

• lambda_1 (float) – Strength of 0-1 transition. Defaults to 1e9.

• lambda_2 (float) – Strength of 1-2 transition. Defaults to 0.8e9.

• gamma_1 (float) – Relaxation rate (1/T1) for 1-0. Defaults to 1e4.

• noise (bool) – Defaults to True. If True then T1 dissipation is included in the pulse-simulation. The strength is given by gamma_1.

Attributes

SingleTransmonTestBackend.coupling_map	Return the CouplingMap object
SingleTransmonTestBackend.default_pulse_unitaries	Return the default unitary matrices of the backend.
SingleTransmonTestBackend.discriminator	Return the discriminator for the IQ data.
SingleTransmonTestBackend.dt	Return the system time resolution of input signals
SingleTransmonTestBackend.dtm	Return the system time resolution of output signals
SingleTransmonTestBackend.instruction_durations	Return the InstructionDurations object.
SingleTransmonTestBackend.instruction_schedule_map	Return the InstructionScheduleMap for the instructions defined in this backend's target.
SingleTransmonTestBackend.instructions	A list of Instruction tuples on the backend of the form (instruction, (qubits)
SingleTransmonTestBackend.max_circuits	The maximum number of circuits (or Pulse schedules) that can be run in a single job.
SingleTransmonTestBackend.meas_map	Return the grouping of measurements which are multiplexed
SingleTransmonTestBackend.num_qubits	Return the number of qubits the backend has.
SingleTransmonTestBackend.operation_names	A list of instruction names that the backend supports.
SingleTransmonTestBackend.operations	A list of Instruction instances that the backend supports.
SingleTransmonTestBackend.options	Return the options for the backend
SingleTransmonTestBackend.provider	Return the backend Provider.
SingleTransmonTestBackend.target	Contains information for circuit transpilation.
SingleTransmonTestBackend.version

Methods

SingleTransmonTestBackend.acquire_channel(qubit)	Return the acquisition channel for the given qubit.
SingleTransmonTestBackend.control_channel(qubits)	Return the secondary drive channel for the given qubit
SingleTransmonTestBackend.defaults()	return backend pulse defaults
SingleTransmonTestBackend.drive_channel(qubit)	Return the drive channel for the given qubit.
SingleTransmonTestBackend.measure_channel(qubit)	Return the measure stimulus channel for the given qubit.
SingleTransmonTestBackend.qubit_properties(qubit)	Return QubitProperties for a given qubit.
SingleTransmonTestBackend.run(run_input, ...)	Run method takes circuits as input and returns FakeJob with IQ data or counts.
SingleTransmonTestBackend.set_options(**fields)	Set the options fields for the backend
SingleTransmonTestBackend.solve(schedule, qubits)	Solves for qubit dynamics under the action of a pulse instruction