Bases: object
Class representing backend properties
This holds backend properties measured by the provider. All properties
which are provided optionally. These properties may describe qubits, gates,
or other general properties of the backend.
Initialize a BackendProperties instance.
- Parameters:
backend_name (str) – Backend name.
backend_version (str) – Backend version in the form X.Y.Z.
last_update_date (datetime.datetime or str) – Last date/time that a property was
updated. If specified as a str, it must be in ISO format.
qubits (list) – System qubit parameters as a list of lists of
Nduv objects
gates (list) – System gate parameters as a list of GateProperties
objects
general (list) – General parameters as a list of Nduv
objects
kwargs – optional additional fields
Methods
-
faulty_gates()[source]
Return a list of faulty gates.
-
faulty_qubits()[source]
Return a list of faulty qubits.
-
frequency(qubit)[source]
Return the frequency of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return frequency of.
- Returns:
Frequency of the given qubit.
- Return type:
float
-
classmethod from_dict(data)[source]
Create a new BackendProperties object from a dictionary.
- Parameters:
data (dict) – A dictionary representing the BackendProperties to create. It will be in
the same format as output by to_dict().
- Returns:
The BackendProperties from the input dictionary.
- Return type:
BackendProperties
-
gate_error(gate, qubits)[source]
Return gate error estimates from backend properties.
- Parameters:
-
- Returns:
Gate error of the given gate and qubit(s).
- Return type:
float
-
gate_length(gate, qubits)[source]
Return the duration of the gate in units of seconds.
- Parameters:
-
- Returns:
Gate length of the given gate and qubit(s).
- Return type:
float
-
gate_property(gate, qubits=None, name=None)[source]
Return the property of the given gate.
- Parameters:
gate (str) – Name of the gate.
qubits (int | Iterable[int] | None) – The qubit to find the property for.
name (str | None) – Optionally used to specify which gate property to return.
- Returns:
Gate property as a tuple of the value and the time it was measured.
- Raises:
BackendPropertyError – If the property is not found or name is
specified but qubit is not.
- Return type:
Tuple[Any, datetime]
-
is_gate_operational(gate, qubits=None)[source]
Return the operational status of the given gate.
- Parameters:
-
- Returns:
Operational status of the given gate. True if the gate is operational,
False otherwise.
- Return type:
bool
-
is_qubit_operational(qubit)[source]
Return the operational status of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return operational status of.
- Returns:
Operational status of the given qubit.
- Return type:
bool
-
qubit_property(qubit, name=None)[source]
Return the property of the given qubit.
- Parameters:
-
- Returns:
Qubit property as a tuple of the value and the time it was measured.
- Raises:
BackendPropertyError – If the property is not found.
- Return type:
Tuple[Any, datetime]
-
readout_error(qubit)[source]
Return the readout error of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return the readout error of.
- Returns:
Readout error of the given qubit.
- Return type:
float
-
readout_length(qubit)[source]
Return the readout length [sec] of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return the readout length of.
- Returns:
Readout length of the given qubit.
- Return type:
float
-
t1(qubit)[source]
Return the T1 time of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return the T1 time of.
- Returns:
T1 time of the given qubit.
- Return type:
float
-
t2(qubit)[source]
Return the T2 time of the given qubit.
- Parameters:
qubit (int) – Qubit for which to return the T2 time of.
- Returns:
T2 time of the given qubit.
- Return type:
float
-
to_dict()[source]
Return a dictionary format representation of the BackendProperties.
- Returns:
The dictionary form of the BackendProperties.
- Return type:
dict